x 50 x 45
Description: A well-formed schorl crystal with a shiny, jet-black colour, multiple terminations and a partial 'mercedes' sign. The specimen has striking facets, and is partly covered with brownish feldspar.
Weight of Specimen: 224.9 g
Composition: NaFe2+3Al6Si6O18(BO3)3(OH)4 (schorl)
on Mohs Scale: (schorl) 7.5
Location: Erongo Mountains, Erongo Region, Namibia.
Specimen Code: NERS 019
US $ 130