Diopside crystals observed in elbaite tourmaline resemble an exclamation point.
Read MoreInclusions of native copper and tenorite (CuO) were found in grayish green elbaite from São José da Batalha, Paraíba, Brazil.
Read MoreUnusually vivid tourmalines from the state of Paraiba, in north eastern Brazil, have attracted great interest since they first appeared on the international gem market in 1989.
Read More
Identifies 13 copper-bearing tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite.
Read MoreThe most important source of yellow gem elbaite is the Canary mining area in the Lundazi District of eastern Zambia.
Read MoreTourmalines have a very complex chemical composition, and more than a dozen mineral species are recognized within this group.
Read More“Paraíba” tourmalines, continue to be recovered in small amounts from northeastern Brazil.
Read MoreThe Mt. Mica area in southwestern Maine has been mined for tourmaline and other pegmatite gems since the 1820s.
Read MoreCARLSBAD, Calif. – May 16, 2019 – The Spring 2019 issue of Gems & Gemology presents articles on tourmaline classification, sapphire origin determination via inclusion analysis, a legendary reliquary, identifying origin of freshwater pearls, the impact of cut and orientation on alexandrite’s color change and more.
Read More
