Biotite on Anthophyllite | Czech Republic Kyanite 5" and weighs 1lb

5" and weighs 1lb

This item is 3" x 2" and weighs 11 oz

Slovakia and the United States

This is one of the few minerals that can form crystals ranging anywhere between gemmy and transparent to opaque and metallic-like

Biotite on Anthophyllite | Czech Republic Kyanite 5" and weighs 1lbBiotite on anthophyllite refers to a common geological occurrence where dark mica (biotite) crystals grow within or around fibrous anthophyllite, an amphibole mineral, often forming attractive specimens with distinct textures like bladed crystals or nodular "balls," indicating specific metamorphic conditions (low HCl fluids). This item is 3. 5 x 2 and weighs 8. 0 oz