are between 35 - 80 Carats each and measure 20 - 35 mm (0

The color can vary based on the presence of copper and iron

and is very soft at only 1 on Mohs' hardness scale

In this cluster

Tetrahedrite, Pyrite and Quartz Crystal | AAA Cluster | 642 Grams | Peru | SO24 Aventurine are between 35 - 80This beautiful cluster combines tetrahedrite, cubic and crystallized pyrite matrix and tiny terminated quartz crystals. Tetrahedrite crystals are fascinating minerals known for their distinctive tetrahedral shape and shiny, metallic luster. It typically forms in well defined tetrahedral crystals, which can be grouped in clusters. The color range includes shades of metallic gray, black, and sometimes reddish hues due to the presence of copper and other