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highly sought-after brecciated agate/jasper found only in the Mississippian limestone caves near Guernsey and Glendo
This item is 7
These stones are made up of fragments of course-grained igneous rock
often forming attractive specimens with distinct textures like bladed crystals or nodular "balls
Biotite on Anthophyllite | Czech Republic purple highly sought-after brecciated agate/jasper foundBiotite 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 2 and weighs 2. 15 oz
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