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Selenite is a Clear gypsum mineral with a moh's hardness of 2.
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Fluorite is Green Halide mineral with moh's hardness 4.
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Hemalite is a Massive, dense red to gray, classic example of iron ore.
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Basic Set of Natural Crystals
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A textbook example of pure crystalline carbon which is extermely soft.
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Fools gold Brassy color which leaves a black streak.
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Earthy, yellow brown iron ore.
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Galena is a light metallic gray cleavage of lead ore
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Spinel group; black, dull metallic luster; common iron oxide.
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Massive sedimentary gypsum with a moh's hardness 2..
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Anorthite, Bulk Pack, 1 kg
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Clacite (Chalk), Hand Specimen, Each
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The New York State Regents Examination in Physical Setting/Earth Science (Part D) consists of two components: a laboratory performance test and a writ...
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Nearly pure, green crystalline forsterite.
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Deep purple crystal clusters.
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Light pink, massive, crystalline, translucent.
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