Schorl - Dravite Tourmaline in Quartz #4 Popular Crystals_Shungite and helps geologists to understand

and helps geologists to understand the conditions in which these layers were formed

inadequacy and fear

This particular trilobite trace fossil specimen is an excellent example of Cruziana

This Ethiopian Opal specimen is very hard to show on camera

Schorl - Dravite Tourmaline in Quartz #4 Popular Crystals_Shungite and helps geologists to understandThis incredible specimen of Tourmaline in Quartz is believed to be from the Piaui River Pegmatite in Minas Gerais Brazil, rather than the more commonly labelled Piaui region in north east Brazil. Rather than being a straight Black Tourmaline (Schorl), it displays a rich yellow green brown colour when backlit, and is instead much more likely to be a member of the Schorl Dravite series, with varying concentrations of iron and magnesium. The growth