Raw Mexican Opal Collection fossils This striking specimen features well-formed

This striking specimen features well-formed dogtooth calcite crystals from the historic Tri-State mining district spanning Missouri

This specimen is displayed in a perky box with an identification label

These stones are made up of fragments of course-grained igneous rock

Though it can be found all over the world

Raw Mexican Opal Collection fossils This striking specimen features well-formedA vibrant mix of raw opals straight from Mexico, showcasing warm flashes of orange, honey and occasional hints of fire within. Each piece is left in its natural state. These are a variety of hydrated silica often found in volcanic regions where silica rich water filled cavities and slowly formed these luminous stones. #1 of 4 ( For shop purposes only) This collection is 1. 4 oz