3.6" Rough Green Nontronite Mineral Specimen Jove Lauriano Minas Gerais Brazil Tooth and black chalcedony as onyx

and black chalcedony as onyx

cave bears likely spent much of their lives dwelling in caves

7" Postosuchus tooth originates from Late Triassic strata of Arizona's Chinle Formation

more intricate branching patterns

The workers in Morocco do a very professional job

3.6" Rough Green Nontronite Mineral Specimen Jove Lauriano Minas Gerais Brazil Tooth and black chalcedony as onyxLocation: Jove Lauriano Claim, Minas Gerais, Brazil Weight: 3. 2 Ounces Dimensions: 3. 6 Inches long, 2. 2 Inches Wide, 1. 6 Inches Thick The Item pictured is the one you will receive. Nontronite is a green clay mineral belonging to the smectite group, which also includes minerals like montmorillonite and saponite. Named after the town of Nontron in France, where it was first discovered, nontronite is typically found in low grade metamorphic rocks,