
Raw Black Tourmaline Crystal
This specimen is a raw, unpolished piece of black tourmaline, also known as schorl. The item exhibits a deep, opaque black color with a sub-metallic to vitreous luster that catches the light on its various facets. Physically, it displays the characteristic trigonal crystal system associated with tourmaline, featuring prominent vertical striations and ridges along the length of the specimen. The shape is somewhat tabular and irregular, suggesting it was broken or mined from a larger crystal cluster. In terms of size, it appears to be a hand-held cabinet specimen, likely ranging from 2 to 4 inches in length. The surface shows a rugged, natural texture with some visible pitting and jagged edges, which are typical for raw minerals rather than polished decorative stones. No artificial coatings or treatments are immediately apparent. The condition appears to be excellent for a natural specimen, with no significant chips or fractures that detract from its organic form. There are no maker's marks or signatures, as this is a natural geological formation. Geologically, black tourmaline is an iron-rich mineral typically formed in granitic pegmatites. This specific piece lacks significant matrix attachment, presenting as nearly pure schorl.
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Estimated Value
$15 - $35
Basic Information
Category
Minerals and Gemstones
Appraised On
March 4, 2026
Estimated Value
$15 - $35
Item Description
This specimen is a raw, unpolished piece of black tourmaline, also known as schorl. The item exhibits a deep, opaque black color with a sub-metallic to vitreous luster that catches the light on its various facets. Physically, it displays the characteristic trigonal crystal system associated with tourmaline, featuring prominent vertical striations and ridges along the length of the specimen. The shape is somewhat tabular and irregular, suggesting it was broken or mined from a larger crystal cluster. In terms of size, it appears to be a hand-held cabinet specimen, likely ranging from 2 to 4 inches in length. The surface shows a rugged, natural texture with some visible pitting and jagged edges, which are typical for raw minerals rather than polished decorative stones. No artificial coatings or treatments are immediately apparent. The condition appears to be excellent for a natural specimen, with no significant chips or fractures that detract from its organic form. There are no maker's marks or signatures, as this is a natural geological formation. Geologically, black tourmaline is an iron-rich mineral typically formed in granitic pegmatites. This specific piece lacks significant matrix attachment, presenting as nearly pure schorl.
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