Biotite on Anthophyllite | Czech Republic Kyanite Black Tourmaline is a common

Black Tourmaline is a common

it is most famous for its brilliant green/blue fluorescence under shortwave UV light

Natural citrine is rare

colored by trace elements such as titanium

5" and weighs 1lb

Biotite on Anthophyllite | Czech Republic Kyanite Black Tourmaline is a commonBiotite 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