Biotite on Anthophyllite | Czech Republic minerals This polished freeform highlights its

This polished freeform highlights its vivid royal blue tones accented by shimmering gold and soft white calcite veining

Featuring a contrast of the brassy luster of the pyrite with the white snowy texture of the quartz

Formed over millions of years as ancient coral gradually transformed into agate

making it a particularly significant specimen for collectors

55 oz and is 3

Biotite on Anthophyllite | Czech Republic minerals This polished freeform highlights itsBiotite 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. 5 x 1. 5 and weighs 4. 55 oz