It formed by metamorphosis of mudstone and shale or some form of igneous rock

Dimensions:  Specimen 20x10x7 mm / 0

The greatest distance between the find sites was 6

Product ID: TOCE6906

Approx Weight (per Lot): 13

Natural Herkimer Diamonds | 4.25 carat Lot | 4.7 - 7.5 mm | Herkimer County NY | SO24 Tetrahedrite It formed by metamorphosis ofThis is a 4. 25 carat, 8 piece lot of beautiful little Herkimer diamonds. They measure 4. 7 7. 5 mm in length and each of them have multiple terminated points. Herkimer Diamonds are beautiful double terminated quartz crystals which are found mainly in Herkimer County, New York. Incredibly, these phenomenal gemstones are believed to be close to five hundred million years old. The crystals are magnificent works of nature found in the rock, appearing to