This stunning crystal specimen is a must-have for any collector of natural wonders. The orange calcite crystal is truly a sight to behold, measuring between 5-8 inches in size. The specimen was sourced from Mexico, known for its rich mineral deposits. The crystal's unique shape and color make it a standout addition to any collection of rocks, fossils, and minerals. It's perfect for display in an office or home, and is sure to be a conversation starter. Don't miss out on the opportunity to own this one-of-a-kind crystal specimen.

This listing is for your choice of the very bright orange Calcite crystal specimens from Mexico pictured. You will receive the actual specimen you select. These extra large polished (acid washed) crystals are very colorful and would make a great addition to your collection on your mantle or shelf or for a gift for a loved one or rockhound.

Measurements:

1: 7.5x4x3" - 2.6 Lbs
4: 5x4x4" - 3 Lbs
6: 8x3x2" - 2 Lbs
7: 7x5x4" - 3.6 Lbs
9: 6x5x3" - 4.4 Lbs
11: 7x6x4" - 3.8 Lbs
12: 4x3x3" - 1.9 Lb
14: 3x2x2" - .7 Lbs
15: 3x2x2" - .5 Lbs
16: 6.5x2x2" - .9 Lbs
17: 6x5x4" - 3.3 Lbs
18: 5x4x4" - 4 Lbs
19: 5x4x3" - 3 Lbs
20: 7x6x3" - 4.2 Lbs
21: 4.5x3x2" - 1.2 Lbs
22: 3.5x2x1.5" - .4 Lbs
23: 6x2x2" - 1 Lb.
24: 4x4x3" - 3 Lbs
25: 4x3x1" - .8 Lbs
26: 6x5x2" - 1.8 Lbs
Calcite is a common constituent of sedimentary rocks, limestone in particular, much of which is formed from the shells of dead marine organisms. 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.

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