Rough Tourmalines
We are offering an extraordinary and rare raw ParaÂba tourmaline weighing an impressive 3,005 carats (601 grams). This gemstone, renowned for its unique neon-blue to greenish hue, represents the epitome of exclusivity and rarity in the gemstone market. Details of the Gemstone: Quantity: 1 Gem Weight: 3,005 CTs (601g) Color: Neon blue, with greenish undertones Density: 3 - 3.2 g/cm³ Refractive Index: 1.614 - 1.666 Chemical Composition: Complex borosilicate with copper (Fe, Cu, Mn, Al, Si) Crystal Structure: Trigonal Luster: Vitreous Fracture: Uneven, conchoidal, typically elongated crystals with triangular sections and rounded faces, clear parallel striations Fluorescence: None Hardness: 7 - 7.5 on the Mohs scale Lapidation Type: Uncut, raw form Negotiable sale value GIA Certificate Appraised value after polishing: US$60,000,000.00 FOB Gem location: Sao Paulo, Brazil Payment methods: Letter of credit or debit card
Rough stone tourmaline from Afghanistan different types and color
Tourmalines,not very clean but beautifulgreen colour Vary from very small to big
Black Tourmaline Rough size 100g 4kg India origin Price 6 usd per kg cif India Categories: Rough, Tourmaline Gemstone Black Tourmaline Shape Rough Location India Lot-No blacktour Origin India Size 100g -4kg
Supplier: Tourmaline Rough
Supplier: Tourmaline Rough
Supplier: Tourmaline-rough
Supplier: Tourmaline-rough
