Black unknown tumbled cab raw uncut rough gemstone cabochon

Tumble Polished > Everything Else Miscellaneous Tumbled Polished Cabs Rough Black unknown think maybe aventurine with mica or moonstone or black tourmaline with quartz which would be our guess ? cab cabbing cabochon tumbled not polished rough wire wrapping gemstone Raw uncut cabs lapidary Miscellaneous Tumbled Polished Cabs Rough http://facetroughgemstones.com/gem-store/product_info.php/products_id/4545