Water Clear Quartz Crystal with Starbrary Markings, Minas Gerais, Brazil crystal jewelry Nearly all botryoidal fluorite on

Nearly all botryoidal fluorite on quartz specimens from India are partially processed to optimize the shape

Polish as needed with the included polishing cloth

That color mix — cyan fluorescence with greener afterglow - is consistent with Mn-activated calcite with minor secondary activators and trace Pb or rare earth elements (not uncommon in Deccan Trap cavity calcites)

It was developed by Peter Johns at Middlesex University in 1990

Size: 50 x 23 x 12 mm

Water Clear Quartz Crystal with Starbrary Markings, Minas Gerais, Brazil crystal jewelry Nearly all botryoidal fluorite onWater clear quartz crystal with unique starbrary glyphs and markings. There is a chip on one of the face edges. Very unique crystal and far more beautiful than is captured in the photos. Size: 70 x 46 x 32 mm. 90 grams From: Corinto, Minas Gerais, Brazil