Schorl : NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
4.2cm x 2.5cm x 1.7cm
Photo added to mindat.org
“A choice lustrous black single terminated loose schorl crystal. Size: 4.2 x 2.5 x 1.7 cm.”
Dan Weinrich - 26th April 2009
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