Aragonite 4.20 ct.
Aragonite 4.20 ct.
Aragonite
Is a Calcium Carbonate with formula and hardness of 3.5-4.I s a polymorph of calcite,that means :same chemical composition but different structure and crystal shape,and is also more compact than calcite and much rarer.Crystals are generally small.This gem here comes from Herenec locality,Northern Bohemia,Czech Republic.
Size: 11.3x8.1x6.2 mm.
Weight: 4.20 ct.
CODE#1390