Saturday, Sept 21 2024

Rare Fluornatromicrolite (type locality) with Muscovite, Albite, and Schorl - PMRARE15-061 - Lavra Quixaba - Brazil Mineral Specimen

By A Mystery Man Writer

Rare Fluornatromicrolite (type locality) with Muscovite, Albite, and Schorl, Lavra Quixaba, Frei Martinho, Paraiba, Brazil, cabinet, 7.0 x 5.0 x 4.5 cm, 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.
For those who helped create the Genki Dama
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.