Franklinite
3.18 ct
H5
Trillion Cut
8.30 x 8.30 x 4.90 mm
New Jersey
USA
max850

Franklinite

Is an important Zinc/ Manganese mineral found in New Jersey together with other exotic and rare minerals. The formula is : Zn, Fe, Mn)(Fe, Mn)2O4, Zinc Iron Manganese Oxide.

The hardness is 5 and has a metallic luster, rarely offered as a facet gem.