These gems became known as Paraíba tourmalines after the locality of their discovery. In the early twenty-first century, similarly colored gem-quality tourmalines were discovered in Nigeria and ...

Learn how to buy an engagement ring with confidence—explore budget tips, diamond alternatives, vintage styles, and ethical sourcing in this expert-backed shopping guide.

05 Sep 2024 (Johannesburg Stock Exchange) Gemfields Group Limited has reported auction revenues totaling USD 2.30 million from its recent sale of predominantly commercial-quality sapphires ...

Pizzo Tremogge in Val Malenco, Italy, is a source of gem-quality serpentine. Samples from this mountain locality were investigated by standard gemological and petrological methods, Raman spectroscopy, ...