ERYTHRITE MINERAL SPECIMEN
An Erythrite Mineral Specimen to add to your collection. Good formation of translucent Erythrite Crystals in the classic colour of Crimson. As with some of the best most brightly coloured minerals this one contains a toxin, in this case Arsenic. The large triangular crystal in the main photo is 5mm on the longest edge.
Bou Azzer, Morocco.
7.1cm x 4.8cm x 3.3cm, 91g.
Hydrated Cobalt Arsenate:
Erythrite is a wonderful mineral for people who like striking, unusual colors. Its characteristic bright red-purple color is very noticeable and was used to spot veins of cobalt bearing ore. Erythrite, or “Cobalt Bloom” as it is called by miners, is a weathering product of cobalt containing minerals such as Cobaltite. Where weathered cobalt and nickel ores are found, both Annabergite, Ni3(AsO4)2-8(H2O) and Erythrite become important markers. Annabergite is bright green and the two minerals have the same structure but different chemistries. Most Erythrite is found in the form of crusts, but specimens from Morocco have larger crystals. The unique red-purple color of Erythrite is very attractive, and its nice sparkle make this mineral a joy to add to your collection