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Tourmaline var. Schorl

  • Tourmaline var. Schorl
  • AKA = Black Tourmaline
  • Formula: NaFe2+3Al6(BO3)3Si6O18(OH)4
  • Streak = White
  • Mohs = 7-7.5

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Description

Tourmaline var. Schorl

Formula: NaFe2+3Al6(BO3)3Si6O18(OH)4

Streak = White

Mohs = 7-7.5

Schorl is also known as Black Tourmaline.  It is the most common occurrence of tourmaline.  One of the interesting characteristics of Schorl is the fact that it is never found transparent or translucent.  Other forms of tourmaline do present translucence and transparency.

 

 

Additional information

Weight 4 oz

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Specimen S765523 Category

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