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When clay- and aluminum-rich rock is altered by water from geothermal systems, serpentinite is liable to form. Often found in low-grade metamorphic areas, serpentinite is composed of hydrated silicate minerals, particularly phyllosilicates Ideal for identification & classification exercises....
A fun introduction to the world of geology through metamorphic rocks! Metamorphic rocks were once another type of rock but have been transformed through high heat and pressure. Each Tech Cut specimen is selected and hand processed, ensuring each sample exhibits defining features. Set includes twelve...
Pack of 12 Carbonaceous shale samples approximately 1" (3cm) in size Carbon within samples indicates it was deposited in an anoxic environment, such as the deep sea Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence...
Phyllite is a good example of low-grade metamorphism from an easily recognizable parent rock. The fissile property of slate is retained, but has attained a glossy sheen and soapy feel more indicative of metamorphic material Ideal for identification & classification exercises. Demonstrates...
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 identification & classification...
Hematite is made up of iron and oxygen, giving it a distinct red, earthy color. Although hematite can form in a variety of appearances, this mineral is instantly recognized by the reddish brown streak it leaves behind when powdered Ideal for identification & classification exercises. Ideal for...
Pack of 12 Arkose samples approximately 1" (3cm) in size Small, angular grains indicate deposition in an ephemeral river system near to the clast source Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Great...
Garnet comes in a variety of colors & shapes - this specimen is a deep red color. Garnet forms under intense heat and pressure conditions, making it a common mineral in mountainous terranes Ideal for identification & classification exercises. Great for lessons in metamorphic facies & silicate...
This foliated metamorphic rock usually forms at convergent plate boundaries, and recrystallizes with immense heat and pressure Excellent for students learning about differential stresses and foliation in metamorphic rocks. This set of twelve samples is excellent for group study and examination Each...
Pack of 12 Hornblende samples approximately 1" (3cm) in size Useful for students to study as an example of two-plane, non-perpendicular cleavage Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Ideal for use...
One of the most common minerals in the earth's crust, feldspar has a variety of physical properties that make it a quintessential mineral to study. It distinctly shows two planes of cleavage & is part of Bowen's reaction series Great for lessons in hardness, cleavage, and crystallization...
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...
This specular variety of hematite takes the form of tiny, sparkling iron oxide crystals Perfect for demonstrations in mineral physical properties. This set of six samples is excellent for group study and examination Each specimen is selected and hand processed, ensuring each sample exhibits defining...
Fluorite can be transparent or come in a variety of colors, such as purple, green & blue. Fluorite is a common mineral in both carbonate and hydrothermal rocks Fluorite is perfect for hands on lessons in hardness, as well as the fickle method of identifying minerals by color. An excellent example...
Pack of 12 Oligoclase samples approximately 1" (3cm) in size Standard hardness of 6, exhibits two planes of cleavage Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements Feldspar with high levels of sodium...
Sometimes referred to as flint, Chert is a sedimentary rock rich in silica This specimen is perfect for teaching geology students about the many forms of quartz, hardness, crystal habit, and fracture. This set of twelve samples is excellent for group study and examination Each specimen is selected...