Amethyst Open Geode 35pc Flat Fluorite " While technically a rhyolite

" While technically a rhyolite due to its thunderegg nature

The one pound lots contain approximately 20 - 30 pieces of 1" in diameter fully tumbled pieces

This ocean wave agate carving

responsible for a great variety of unusual situations

This blue chalcedony carving

Amethyst Open Geode 35pc Flat Fluorite " While technically a rhyoliteAmethyst Geodes from Sonora, Mexico feature small double terminated amethyst crystals and druzy inside a pale pink and white matrix. These are already open geodes with sizes ranging from 4 cm 10 cm (1. 5" 4") in diameter. Its chemical formula is SiO2 and owes its purple coloration to irradiation of ferrous iron: Fe3+. 35 geode pieces in flat.