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Display and Specialty Minerals
Mineral specimens are cut in a variety of sizes to meet various user needs, with common uses including identification on the part of students, displays to be used during lectures and demonstrations, or as chips for convenient physical identification tests in labs. These mineral specimens also demonstrate a number of classic geological features, such as cleavage, and collections of minerals can be used to test the Mohs hardness of other minerals and compare them.
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Quartz (Agate) Geode
Distinctive cut and polished geode halves with agate rims and drusy crystal linings. Average size: 1 1/2–2" diameter. Utah.
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Chalcanthite
Brilliant blue lab-grown copper sulfate crystal group. Average size: 2" x 2". Poland.
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Staurolite (Twin)
Classic staurolite crystal twins in schistose matrix with well-defined crystal form. Average size: 2" x 3". Russia.
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Amazonite
Feldspar group; blue-green, microcline, triclinic, 3/4". Colorado.
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Mimetite
Choice yellow-brown, globular to botryoidal crystal groups of this lead arsenate mineral. A secondary mineral in lead deposits forming a series with pyromorphite and vanadinite. Average size: 1" x 1" to 1 1/2" x 1 1/2". Mexico.
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Apophyllite
Sharp, clear to white, single-terminated, tetragonal, 3/4–1 1/2". India.
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Pyrite (Cube in Matrix)
Sparkling 1/2" single cubic crystal in 1 x 2" matrix. Spain.
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Celestite
Sparkling pale blue transparent crystals in vug-like matrix. Average size: 2" x 2". Madagascar.