Pack of 12 Hornfels samples approximately 1" (3cm) in size Formed at the baked contact between an intruding igneous body and the surrounding rock Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Great for students studying the effects of thermal alteration of metamorphic rocks Specimen comes in clear labeled and barcoded bag for ideal storage Hornfels forms in the narrow band between an igneous intrusion and the surrounding rock. As an intrusion propagates through the crust, the magma scorches and heats the crustal rock around it. This heat chemically alters the crust, forming a baked contact containing hornfels. This samples is good for metamorphic rock classification and identification, and is a great example of heat alteration. Pack of 12 specimen samples.
10 Unpolished Mineral Specimens. Each rock or mineral specimen measures approximately 1-2 inches in length along its longest side, and can vary in color from grey to a dark pink. An igneous volcanic rock that is rich in silica, Rhyolite is known to have a texture that ranges from glassy all the way to porphyritic. This sample of Rhyolite is porphyritic, meaning that at least one group of crystals is distinctly bigger than others that are present. It is also extrusive, which is to say that the magma from which it was formed reached the surface of the Earth, either flowing out (extruding) to the surface, or exploding violently into the open air. It is considered to be the extrusive equivalent to granite, in part due to the resemblance that the can share. Rhyolite is related to obsidian, in that the difference lays primarily in how fast they were cooled. When cooled too quickly, the crystals form into a type of natural glass, known as obsidian. When it cools at a slower rate, microscopic crystals are allowed to form, allowing Rhyolite to occur. Origin: CO
This is a very small specimen, but delicately colored, with flawless quartz crystals.A wonderful E-Bay purchase...
All about the opal gemstone, its varieties, and its physical and metaphysical properties explained.
See photos of rough and cut gemstones and learn about the chemistry of the minerals.
Natural Full Transparent Sky Blue Aquamarine crystal on Matrix Specimen from Shigar Mine Skardu Specimen have Excellent Transparency and Full Damage free Weight. 13 Grams Size: 33*28*20 mm Origin. Shigar Mine Skardu Treatnent: Natural Economy: shipping
Collecting rocks on ocean beaches is one of the easiest and most relaxing ways to rockhound. Here is a guide for what to look for on your next beach trip!
RHYOLITE | Rhyolite is an aphanitic felsic rock which forms during eruptions of thick, viscous magma. Often containing phenocrysts of felsic minerals with only slightly higher crystallization temperatures than the feldspar and quartz that forms rhyolite GREAT FOR GEOLOGY CLASSROOMS | Ideal for identification & classification exercises. The evolved chemistry of the rock makes it lightweight relative to other igneous rocks- a good identifier for classification. This set of six samples is excellent for group study and examination GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Rhyolite Specimen Set of 12 Samples, 1" Rhyolite is an aphanitic felsic rock which forms during eruptions of thick, viscous magma. Often containing phenocrysts of felsic minerals with only slightly higher crystallization temperatures than the feldspar and quartz that forms rhyolite. Ideal for teaching students about rounding and sorting, as well as for identification & classification exercises. The evolved chemistry of the rock makes it lightweight relative to other igneous rocks- a good identifier for classification. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
Natural Purple Colour Phantom Flourite Crystal from Balochistan Mine, Phantom Flourite Specimen Weight: 444 Grams Size: 103*71*45 mm Treatment. Natural Origin: Baluchistan Mine Express : shipping
A thunderegg (or thunder egg) is a nodule-like rock, similar to a filled geode, that is formed within rhyolitic volcanic ash layers. Thunder...
GABBRO | Gabbro is formed within magma chambers, deep within the earth. The chambers hold iron-rich rock melt, too heavy to reach the surface. As the melt cools, olivine and plagioclase feldspar forms GREAT FOR GEOLOGY CLASSROOMS | A great example of phaneritic mafic rock. Useful for exercises in identification and classification of igneous rocks GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Gabbro Specimen Single Sample, 1" Gabbro is formed within magma chambers, deep within the earth. The chambers hold iron-rich rock melt, too heavy to reach the surface. As the melt cools, olivine and plagioclase feldspar forms. A great example of phaneritic mafic rock. Useful for exercises in identification and classification of igneous rocks. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
Natural Sky Blue Aquamarine Crystals with Muscovite Specimen from Nagar Mine Gilgit Baltistan Weight: 78 Grams Size: 58*45*32 mm Treatment. Natural Origin: Chumar Bakhoor Nagar Mine Gilgit Baltistan Express: shipping
THE JERUSALEM EGG COLLECTION—ONE OF THE WORLD’S FINEST COLLECTIONS OF MINERAL EGGS—850 SPECIMENS Minerals from Worldwide...
Chlorastrolite, also known as Isle Royale Greenstone, is a green or bluish green stone found in the Keweenaw Peninsula of Upper Michigan and...
Natural Sky Blue Colour Rainbow inclusion Aquamarine Crystal with Feldspar Specimen from Skardu Mine, Natural Mineral. Aquamarine is Completely Damage free. Weight: 295 Grams Size: 94*68*41 mm Origin Shigar Mine Treatment:Natural Video/Pic: Daylights Express . shipping
Knowing how to polish rocks by hand is handy after a day spent finding some nice specimens. Here’s how to turn a dull piece of stone into a gleaming beauty.
SCORIA | Scoria forms as spatter from bubbly, mafic lava is thrown into the air and cooled quickly. The crystallization happens so quickly that large air pockets are trapped within the rock, often giving samples a jagged, sharp appearance GREAT FOR GEOLOGY CLASSROOMS | A good example of pyroclastic material. Can be used in a variety of igneous classification exercises GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Scoria Specimen Single Sample, 1" Scoria forms as spatter from bubbly, mafic lava is thrown into the air and cooled quickly. The crystallization happens so quickly that large air pockets are trapped within the rock, often giving samples a jagged, sharp appearance. Excellent for classroom mineral study and identification. A good example of pyroclastic material. Can be used in a variety of igneous classification exercises. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
COARSE WHITE MARBLE | Marble is a metamorphic rock formed from limestone. The high-pressure, low-heat alteration leads to a massive crystalline rock that can form a variety of shapes. Marble is mined heavily for use in buildings and furniture, and has traditionally been used in architecture as well. GREAT FOR GEOLOGY CLASSROOMS | Though much denser than limestone, marble will still effervesce in acid, making it useful in identification exercises GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY LABELED PACKAGING | Samples are packaged in a transparent bag, labeled & barcoded for easy identification Coarse White Marble Specimen Single Sample, 1" Marble is a metamorphic rock formed from limestone. The high-pressure, low-heat alteration leads to a massive crystalline rock that can form a variety of shapes. Marble is mined heavily for use in buildings and furniture, and has traditionally been used in architecture as well. Though much denser than limestone, marble will still effervesce in acid, making it useful in identification exercises. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Specimen is packaged in a transparent bag that is labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
VOLCANIC TUFF | Dust & ash deposited during explosive volcanic eruptions can become compacted and lithified over time, forming large packages of tuff. These layers show a record of the eruptions size & intensity, and allow geologists to estimate the rate of activity GREAT FOR GEOLOGY CLASSROOMS | Ideal for identification & classification exercises GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Volcanic Tuff Specimen Single Sample, 1" Dust & ash deposited during explosive volcanic eruptions can become compacted and lithified over time, forming large packages of tuff. These layers show a record of the eruptions size & intensity, and allow geologists to estimate the rate of activity. Ideal for teaching students about rounding and sorting, as well as for identification & classification exercises. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
Pack of 10. Each rock or mineral specimen measures approximately 1-2 inches in length along its longest side. Commonly distributed, Gneiss is created by the high-grade metamorphic processes from pre-existing rock formations that started out as either igneous or sedimentary rocks. Typically, gneiss is foliated, or composed of layers, with alternating light and dark colored bands, called "gneissic banding". Unlike a lot of names, gneiss actually comes from Middle High German verb gneist, rather than Latin, and means "to spark", due to its glittering nature. Origin: WY, CO, UT
Huge specimen of rough aquamarine beryl. Würzburg Mineralogical Museum
Mother Nature can be quite the comedian, and agate specimens are no exception! From faces that look like they belong in a cartoon to landsca...
These are pictures of different types of crystals of elements, minerals, and compounds. Some crystals can be grown, while others are found in nature.
SLATE | Slate is the result of the compression of shale, but is denser and retains the fissile properties, making for an interesting exercise when distinguishing between the two rocks GREAT FOR GEOLOGY CLASSROOMS | Ideal for exercises in metamorphic rock identification due to its recognizable platy foliation GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Slate Specimen Single Sample, 1" Slate is the result of the compression of shale, but is denser and retains the fissile properties, making for an interesting exercise when distinguishing between the two rocks. Ideal for exercises in metamorphic rock identification due to its recognizable platy foliation. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
LIMESTONE CHALK | Limestone is made up of organic material, primarily calcium carbonate. The chalk variety consists of the shells of coccolithophores, small platy animals that stack together and powder easily. Large layers of chalk indicate a low-oxygen environment, most likely ancient seafloor beds GREAT FOR GEOLOGY CLASSROOMS | Ideal for identification & classification exercises. Provides an excellent example of chemically formed sedimentary rock GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Limestone Chalk Specimen Single Sample, 1" Limestone is made up of organic material, primarily calcium carbonate. The chalk variety consists of the shells of coccolithophores, small platy animals that stack together and powder easily. Large layers of chalk indicate a low-oxygen environment, most likely ancient seafloor beds. Ideal for teaching students about rounding and sorting, as well as for identification & classification exercises. Provides an excellent example of chemically formed sedimentary rock. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
Unearth rock, gemstone or mineral specimens at Ontario’s exciting rockhounding hotspots and learn about the province’s geological past.
ANDESITE | Andesite features abundant phenocrysts in a fine grained matrix, and offers a great demonstration of igneous porphyry GREAT FOR GEOLOGY CLASSROOMS | Ideal for identification & classification exercises. Andesite is an excellent example of porphyry in igneous rocks. The fine-grained felsic matrix contains larger, identifiable hornblende crystals, indicating two different rates of cooling GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Andesite Specimen Single Sample, 1" Andesite features abundant phenocrysts in a fine grained matrix, and offers a great demonstration of igneous porphyry. Ideal for identification & classification exercises. Andesite is an excellent example of porphyry in igneous rocks. The fine-grained felsic matrix contains larger, identifiable hornblende crystals, indicating two different rates of cooling. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
Mother Nature can be quite the comedian, and agate specimens are no exception! From faces that look like they belong in a cartoon to landsca...
BASALT | Basalt makes up a large majority of the earth's oceanic crust. Formed quickly from a magma that is rich in iron, basalt exhibits a dark color and small crystal size GREAT FOR GEOLOGY CLASSROOMS | The perfect example of an aphanitic igneous rock. Useful for lessons in igneous rock classification and identification GEOLOGIST SELECTED | Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features LOCALLY PROCESSED | Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY INDIVIDUALLY PACKAGED & LABELED | Each specimen sample is packaged in a transparent bag, and is labeled & barcoded for easy identification Raw Basalt Specimen Single Sample, 1" Basalt makes up a large majority of the earth's oceanic crust. Formed quickly from a magma that is rich in iron, basalt exhibits a dark color and small crystal size. The perfect example of an aphanitic igneous rock. Useful for lessons in igneous rock classification and identification. While each specimen will vary slightly in shape, size and color, it will measure approximately 1" in length. Each is individually packaged, labeled & barcoded for easy identification and storage. Selected & Processed by a Geologist. Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY. Technical Support Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.
Sea Stones I (by alatvianRita)
