Biotite on Anthophyllite | Czech Republic metal 5" and weighs 4

5" and weighs 4

dendritic fossils look like plants but are actually deposits of manganese oxide on limestone that has crystallized into a branch pattern that looks similar to a plant

5” x 1” x 5” and weighs 23 oz

25” x 3” and weighs 5

” displays fine inclusions of pyrite that add a metallic shimmer to its soft green surface

Biotite on Anthophyllite | Czech Republic metal 5" and weighs 4Biotite 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 2 x 1. 5 and weighs 2. 6 oz