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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 A good example of pyroclastic material. Can be used in a variety of...
A fun introduction to the world of geology through sedimentary rocks! Sedimentary rocks are formed by the deposition and compression of particles of other rocks and minerals. Each Tech Cut specimen is selected and hand processed, ensuring each sample exhibits defining features. Set includes twelve...
Augite is a common rock-forming pyroxene mineral that forms as magma is cooling. It is an imperative sample for lessons on Bowen's reaction series Augite's perpendicular planes of cleavages make it an excellent tool for studying 2-plane, 90° cleavage Each specimen is selected and hand processed,...
Anthracite coal is bright and reflective, indicative of the intense heat and pressure required to form it. Anthracite coal often has a favorable purity ratio, containing mostly organic material and relatively few impurities Ideal for identification & classification exercises. Allows students can get...
Pack of 12 Siltstone samples approximately 1" (3cm) in size Clastic sedimentary rock made up of fine silt particles Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Good sample for use in identifying...
Found within igneous and metamorphic rocks. Biotite mica's sheet like appearance and glassy luster make this mineral easy to identify Mica's thin and layered structure is perfect for demonstrating variable hardness and cleavage, physical properties of minerals, as well as Bowen's reaction series....
Commonly found as magmatic intrusions in the crust, granite forms slowly in shallow or evolved magma chambers. The large crystals are indicative of a slow cooling rate, and make mineral identification simple Ideal for identification & classification exercises. This classic igneous rock is a...
Much of the earth's surface is covered in oceanic crust, of which olivine is a major component. With the highest crystallization temperature, olivine is the first mineral to form in a magma, making it a useful geothermometer Ideal for identification & classification exercises, and is great for...
Galena grows in beautiful metallic cubes. Often refined as lead ore, galena can also be used to teach students about a mineral's luster, streak, and cleavage. Because of the lead in the chemical formula, it is much denser than other minerals, which makes it seem unnaturally heavy for its size Ideal...
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...
Pack of 12 Sulfur samples approximately 1" (3cm) in size Great for students learning about streak tests - sulfur leaves an unexpected white streak Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Ideal for...
Pack of 12 Sphalerite samples approximately 1" (3cm) in size Often mined as a zinc ore Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Sphalerite sometimes exhibits triboluminescence, meaning it will glow...
The massive, gray variety of limestone is often found deposited in marine environments. It is made up of organic material, primarily calcium carbonate Excellent for demonstrating the tendency of calcium carbonate to effervesce in acid, and is perfect for identification and classification exercises....
Pack of 12 Pegmatite samples approximately 1" (3cm) in size Igneous rock containing a large variety of crystal sizes Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Pegmatite indicates two different periods...
Through the process of metasomatism, hot fluid infiltrates the atomic structure of other silicate minerals, altering them to form talc. Talc is at the bottom of the Mohs scale of hardness, and has a distinct soapy feel Ideal for identification & classification exercises. A great example for lessons...
Magnetite forms as an accessory mineral from an igneous melt. As it cools, the iron in its atomic structure becomes magnetized Magnetite's attraction to magnets and distinctive black streak make it an excellent tool for identification exercises. This set of twelve samples is excellent for group...