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RNSBT-DG-1KG
Quantity: 1 kilogram
Average size range: 1 to 4 inches
Formed when boron forms compounds with iron-sodium molecules, Schorl black tourmaline, or simply black tourmaline, derives its name from the German village of Zschorlau where it was first discovered in a nearby tin mine in the late 1300s.
Higher grade than I expected for the price! Neat variety of shapes & sizes too.