Schorl - Dravite Tourmaline in Quartz #2 Popular Crystals_Smoky Quartz some with clear patches of

some with clear patches of clear Selenite growth

In the Middle Ages

Polychrome Jasper is a stunning variety of Jasper that was only fairly recently discovered in Madagascar

and some excellent crystal formations can be seen in London's Natural History Museum

Gorgeous huge terminated Feldspar crystal with UV reactive Hyalite Opal Specimen from Namibia

Schorl - Dravite Tourmaline in Quartz #2 Popular Crystals_Smoky Quartz some with clear patches ofThis 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