Measurements: 44 x 41 x 33 mm
Description: A schorl crystal with good faces. There is a small patch (5 mm diametre) of hyalite opal on one of its facets (image bottom right).
The terminations have only a few very minute nicks. It has several natural pressure marks, and a bit of damage at the bottom, where it parted from its matrix.
Weight of Specimen: 91.6 g
Composition: NaFe2+3Al6Si6O18(BO3)3(OH)4 (schorl)
Hardness on Mohs Scale: (schorl) 7.5
Specimen Code: BARG 018
US $ SOLD