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Minerals are naturally occurring inorganic compounds with a quantified chemical composition and crystalline structure. There are eight classes of minerals categorized by the anion group. This collection contains samples from each class. 50 keyed specimens, size 1.5 x 1.5 The set is housed in a compartmentalized collection box The name and chemical composition of each…
The cleavage of a mineral is its tendency to split easily or to separate along flat planes or surfaces. There are several common types of cleavage and therefore is a useful property for mineral identification. This collection illustrates the different types of cleavage, with 6 rock specimens each approximately 1.5 x 1.5 in size. Each…
This collection contains 15 long and short wave fluorescent mineral specimens. Fluorescence is an unusual property in that some minerals will emit visible light when exposed to short or long (black-light) wave ultraviolet light or x-rays. UV photon energy excites the electrons of these minerals and they move to a higher energy orbital (excited state)….
When minerals break along non-planar surfaces they are said to fracture. The type of fracture is a very useful tool in identifying a mineral. This collection illustrates the different types of fractures, with 6 rock specimens each approximately 1.5 x 1.5 in size. Each specimen is keyed for identification Specimens: Obsidian, Agate, Chert, Magnetite, Satin…
Igneous rocks are formed from cooling magma. When this occurs below ground they are referred to as intrusive and the crystals are larger. When the cooling takes place on the surface they are called extrusive igneous rock and the crystals are smaller. This collection contains 15 rock specimens grouped by their crystal size and texture…
Luster is the way in which light is reflected from the surface of a mineral. Luster can me metallic or nonmetallic. A mineral with a metallic luster shines like polished metal. Nonmetallic minerals are described as pearly, vitreous, resinous etc. Luster is a reliable tool for mineral identification. This collection demonstrates the property of luster…
Metamorphic rocks are formed from existing rock by the action of heat, pressure and chemicals. This collection contains 15 rock specimens composed of foliated and non-foliated specimens. Each specimen is approximately 1.5 x 1.5 in size and keyed for identification The key also includes useful information regarding the rocks composition, structure, texture and formation Specimens:…
The hardness of a mineral is its resistance to being scratched. The relative hardness of a mineral is determined by comparing it to the hardness of the ten standard minerals that make up Moh s Scale of Hardness.This collection contains one specimen of each of the ten minerals. Each specimen is approximately 1.5 x 1.5…
Under proper conditions, pure minerals will develop into a crystal form characteristic of that mineral. This collection includes specimens that exhibit crystal forms from the six crystallographic systems. Includes a study guide, terminology, and 15 specimens in a compartmented tray. Each specimen is and keyed for identification The key also includes useful information regarding the…
The North American Rock Collection contains 50 specimens representing each of the rock groups found on the North American Continent. The set is housed in a compartmentalized collection box and each 1 x 1 specimen is keyed for identification The key also includes useful information regarding the name and properties of each specimen Specimens: Igneous:…
This collection contains 25 specimens which have distinguishing identifiable physical characteristics. They can be sorted by color, streak, luster, hardness, cleavage, magnetism and specific gravity. The kit includes a magnifier, ceramic and glass streak plates and hardness testing tools. Each 1 x 1 specimen is keyed for identification The key also includes useful information regarding…
Sedimentary rocks form when sediments are compressed and harden into rock. This collection contains 15 rock specimens covering the three classes of sedimentary rock. Each specimen is approximately 1.5 x 1.5 in size and keyed for identification The key also includes useful information regarding the rocks composition, structure, texture and formation Specimens: Clastic: Conglomerate, Arkose,…
Streak is the color of a mineral in its powdered form. The color of a minerals streak may be quite different from the color of the mineral itself. Streak is a reliable tool for mineral identification. This collection demonstrates the streak property with 8 rock specimens each approximately 1.5 x 1.5 in size and a…
The Washington School Collection is an excellent study aid for the geology unit of 9th Grade Earth Science. This collection contains high-quality samples which characterize the properties of common minerals. It also includes samples of the three rock forms. 40 numbered samples, 1.5 x 2 Each specimen is individually keyed for identification Introductory Guide to Rocks…
A sensational collection that reveals the varied and matchless geology of the United States of America! This collection includes specimens representing each of the 50 States. The rock, mineral or fossil selected to represent that state is individually keyed for identification. The key also contains a useful fact about a geologic feature for each individual…
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