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Sellaite

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Simplistically, Sellaite is the magnesium analogue of Fluorite which might sound like it should be common, but in reality it really isn't. Infact, any crystal of Sellaite is rare, as there are very few localities where they have been found, and crystals almost never exceed a couple of centimetres in size and are rarely well defined. The Magnesite deposit at Pedra Preta pit at Brumado, Bahia, Brazil is perhaps the source of the finest crystals, having been discovered there in the early 1980s. This thumbnail specimen is a single matrixless gemmy crystal from Brumado (the location is not more specific), mounted on a small acrylic base for display and handling. At 1.9 x 1.7 x 1.3 cm this is a very large crystal and it has great character, with glassy prism sides and a frosted translucent termination displaying sloping sides with serrated, or castellated features. As a crystal of Sellaite it is perfection, with no damage visible whatsoever. A choice thumbnail from the remarkable systematic species collection assembled by brothers Martin and Michael Günther (1951-2007 & 1956-2021).

Product details

SpeciesSellaite
SizeThumbnail
Dimensions1.3 x 1.7 x 1.9 cm
Added on03/17/2025
LocalityBrazil, Bahia, Brumado
Current owner
Unknown Owner
Previous owners
DateCollectorAcquisition price
—Crystal ClassicsNot disclosed

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Sellaite
Mineral guide
Learn about Sellaite
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Sellaite
Regional guide
Sellaite from Brumado
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Locality guide
Brumado
Brumado, Brazil — renowned magnesite district in Serra das Éguas, yielding glassy magnesite rhombs and tourmalines; a key collector locality with rare minerals.