Quartz Crystals on Calcite - San Antonio Mine, Chihuahua, Mexico
Small delicate crystals of bright green fluorescing quartz are peppered around a matrix of calcite on this striking specimen.
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Calcite - Challenger Cave, Mexico
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SKU: MSJ0291
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We’ve never seen crystalized calcite such as this piece from Challenger Cave. There are many clusters of well-formed calcite crystals fluorescent under all wavelengths and this piece is phosphorescent. We are accustomed to the very phosphorescent rhombs. These pieces display a “BIP”*.
*Brief intense phosphorescence, or “BIP” is a phenomenon where for a brief moment immediately after the shortwave lamp is turned off, it displays a very short-lived, but bright phosphorescence or flash. It’s very difficult to capture this in the photos. Typical for manganese activated calcites.
"Red" Sodalite (Hackmanite) - Deeply Tenebrescent Greenland Mineral
Red sodalite is named for the color it takes on when exposed to sunlight; it is nicely tenebrescent under longwave UV. Under shortwave UV the color deepens, in seconds, to almost black in some areas.
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A Short Study on Rare Occurrences of Apatite from the Ilimaussaq Complex, Greenland
Rarest of the rare from Greenland - apatite has only been observed in a handful of pieces over the decade+ we have been exploring Greenland. Blue apatite crystals fluorescing under UV.
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