Well-formed, green-brown, octahedral crystals of fluornatromicrolite to 4mm in a granite pegmatite matrix consisting of silvery, equigranular muscovite, fleshy albite, and small, black, striated schorl crystals. Although labeled as "bismutomicrolite", the Microlite Group mineral at the Quixaba pegmatite was determined to be fluornatromicrolite as described in 1998, but not published until 2011 due to the revised nomenclature of the Microlite Group and Pyrochlore Supergroup. This specimen is from the type locality. Ex. Paulo Matioli collection.
Linopolis, Doce valley, Minas Gerais, Southeast Region, Brazil
Small Cabinet, 6.9 x 6.8 x 5 cm
Sharp, quite attractive combination piece featuring a single Smoky Quartz crystal emanating from a single Schorl. The Smoky Quartz, gemmy and lustrous, is pristine and 6.3 cm long. The Schorl has excellent luster and an intriguing termination with very fine hexagonal and circular ripple patterns. Naturally, it is contacted on the bottom. Both individual species, by themselves, are very good, and together they make quite an aesthetic pair.
Thumbnail – Maximum 3.0 cm
Toenail – A “gut feeling” but often overlaps between a large thumbnail and a small miniature
Miniature – Maximum 5.0 cm
Small Cabinet – Maximum 9.4 cm
Cabinet – Maximum 18.0 cm
Large Cabinet – Over 18.0 cm
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