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.