Tourmaline, Cruziero Mine, Minas Gerais, Brazil, 7.19 Cts. in hand-constructed Argentium™ Sterling  setting.

Size: 7 3/4

Dissolution is a mineralogical term for an event wherein a newly-formed crystal is exposed

to hot fluids, usually acidic in nature, causing a just-formed crystal surface to become etched.

The rough for this gemstone was the broken-off end of a green crystal, with a flat, smooth surface: in

mineralogical terms, a basal pinacoid. Some inclusions were visible viewing from the  sides, but

the view looking right down into the end was clean in appearance. The lovely pyramidal results of 

dissolution were retained in cutting, leaving evidence within a polished framework that tourmaline

substance had been dissolved after the flat basal pinacoid had formed.