3.1" Rough Green Nontronite Mineral Specimen Jove Lauriano Minas Gerais Brazil Tethydraco The formation of pink tourmaline

The formation of pink tourmaline on crystal quartz occurs through geological processes that involve the presence of specific mineral compositions and conditions conducive to the growth of these gemstones together

a bold calcium carbonate mineral with a hardness of 3

diogenites preserve evidence of deeper crustal or mantle processes

and lineage of the Aepyornis genus

3.1" Rough Green Nontronite Mineral Specimen Jove Lauriano Minas Gerais Brazil Tethydraco The formation of pink tourmalineLocation: Jove Lauriano Claim, Minas Gerais, Brazil Weight: 4 Ounces Dimensions: 3. 1 Inches long, 2. 1 Inches Wide, 1. 7 Inches Thick The Item pictured is the one you will receive. Nontronite is a green clay mineral belonging to the smectite group, alongside montmorillonite and saponite. First discovered in the town of Nontron, France, this mineral is typically found in low grade metamorphic rocks, hydrothermal deposits, and weathered volcanic ash