Water Clear Quartz Crystal with Starbrary Markings, Minas Gerais, Brazil crystal jewelry George Frederick Kunz

George Frederick Kunz

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

Approx 10mm beads

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)

There is a chit at one end

Water Clear Quartz Crystal with Starbrary Markings, Minas Gerais, Brazil crystal jewelry George Frederick KunzWater 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