Measurements: 45 x 33 x 18 mm
Description: A multiterminated group of schorl crystals with distinct growth patterns.
The specimen has a few contact and pressure marks, as well as a few nicks and thin flaws.
Weight of Specimen: 40.5 g
Chemical Composition: NaFe2+3Al6Si6O18(BO3)3(OH)4
Hardness on Mohs Scale: 7.5
Specimen Code: NERS 008
US $ 25