Pegmatite
Previous Owner: MIT
Dimensions:Largest: 13 x 9 x 7 cm; Smallest: 3 x 2 x 1 cm
Place Collected:Fallon Brothers Quarry, Quincy, Norfolk Co., MA
Object number: MITMA846
DescriptionTen pieces and one sample in a glass vial of a very interesting porous pegmatite-related rock with blocky white feldspar crystals in a matrix(?) of small elongate green aegerine crystals. One of the specimens is mostly blue crocidolite, one of the asbestos varietals. This specimen also includes a rare mineral, parisite, few grains are visible, around 1 mm long, elongate brown-orange crystals.