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More rarely they grow in chalcedony-like or opaline masses
5” x 2” and weighs 3
the rocks are usually found in Oklahoma’s Garber sandstone formations
This striking pendant features agatized dinosaur bone
This item is 1” x 2” and weighs 2
Biotite on Anthophyllite | Czech Republic clear quartz More rarely they grow inBiotite 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 and weighs 1. 4 oz
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