Large Green CALCITE Crystal Mineral Specimens * 3-5" Size * Choice of 12 for Sale

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Large Green CALCITE Crystal Mineral Specimens * 3-5" Size * Choice of 12 For Sale

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Large Green CALCITE Crystal Mineral Specimens * 3-5" Size * Choice of 12:
$16.06

Enhance your crystal collection with this stunning large green CALCITE crystal mineral specimen. Measuring between 3-5 inches in size, this natural beauty is available in 12 different choices. The brand Rocksology has sourced this gem from Mexico, where it was carefully handcrafted without any modification. Ideal for those who love collecting crystals, this piece is perfect for display or meditation purposes. It belongs in the categories of crystals, crystal & mineral specimens, rocks, fossils & minerals, and collectibles. Don't miss out on the chance to add this unique and captivating piece to your collection.
These polished (acid washed) crystals measure between 3-5" and are very colorful and would make a great display piece on your mantle or shelf. Please use the value of the die for the specimen number.Dimensions:1: 6x3.5x3" - 3.2 Lbs.
11: 4x3x2.5" - 1.4 Lbs.
12: 4.5x3x2" - 1.8 Lbs.
45: 5x4x3" - 1.6 lbs.
47: 5x4x3" - 1.7 lbs.
58: 5x3x1" - .9 lbs.
64: 5x3x2" - 1.2 Lbs.
67: 5x4x2" - 1.6 Lbs.
69: 4x2x2" - 1 Lbs.
70: 4x3x2" - .8 Lbs.
82: 3x3x2" - .7 Lbs.
89: 2.5x2x2" - .5 Lbs.
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CALCITE PROPERTIES:
Calcite is often the primary constituent of the shells of marine organisms, e.g., plankton (such as coccoliths and planktic foraminifera), the hard parts of red algae, some sponges, brachiopods, echinoderms, some serpulids, most bryozoa, and parts of the shells of some bivalves (such as oysters and rudists). Calcite is a common constituent of sedimentary rocks, limestone in particular, much of which is formed from the shells of dead marine organisms. Approximately 10% of sedimentary rock is limestone. Calcite is also the primary mineral in metamorphic marble. It also occurs as a vein mineral in deposits from hot springs, and it occurs in caverns as stalactites and stalagmites. Calcite may also be found in volcanic or mantle-derived rocks such as carbonatites, kimberlites, or rarely in peridotites. High-grade optical calcite was used in World War II for gun sights, specifically in bomb sights and anti-aircraft weaponry. Also, experiments have been conducted to use calcite for a cloak of invisibility. Microbiologically precipitated calcite has a wide range of applications, such as soil remediation, soil stabilization and concrete repair.Category - Carbonate mineral.
Formula - CaCO3.
Color - Colorless or white, also gray, yellow, green,
Crystal habit - Crystalline, granular, stalactitic, concretionary, massive, rhombohedral.
Crystal system - Trigonal hexagonal scalenohedral.
Twinning - Common by four twin laws.
Cleavage - Perfect on three directions.
Fracture - Conchoidal.
Tenacity - Brittle.
Hardness - 3 (defining mineral).
Luster - Vitreous to pearly on cleavage surfaces.
Streak - White.
Specific gravity - 2.71.
Other characteristics - May fluoresce red, blue, yellow, and other colors under either SW and LW UV; phosphorescent.
Courtesy of Wikipedia

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