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It is indeed a pleasure to showcase in this occasion ultra rare Colombian Mercaderes sapphire rough of an exquisite crystal, these kind of sapphires are considered rarities, these natural Colombian Sapphires have a competitive quality, this stone has a beautiful pastel yellow colour, and a magnificent crystallization, can be cut into a beautiful gem, or if you’re a collector of rare precious minerals, this is a great opportunity to acquire this stone.

Gem: Colombian sapphire rough

Origin: Mercaderes, Cauca, Colombia

Color: Pastel yellow

Shape: Rough-crystal

Dimensions: 8.79x4.86x4.23mm

Weight: 2.70 Ct

Treatment: None

Price per carat: 370 USD

price: 999 USD

FIXED PRICE

Our Colombian sapphires are ethically sourced using artisanal techniques, only collected from the river beds, by “guaqueros” or independent miners, This deposit continues to produce in small quantities, with most material extracted from riverbeds using picks and shovels. Independent miners collect year-round and go to Bogotá to sell the material. The corundum mines of Colombia are located in the southern part of the Cordillera Central, specifically in the Mercaderes - Rio Mayo region. These corundum occurrences are found in the alluvial deposits of the Rubi, Guabo, Paloverde, Limoncito, Chenequeta, Cocal, Monteoscuro, Monserrate and Honda streams, where the material from the Granatifera Tuff is eroded. The corundums show surface features indicating transport, corrosion and mechanical abrasion. These materials are not likely to be cogenetic with the lamprophyric host, but are possibly crustal fragments accidentally incorporated into the eruption magma. The presence of rutile and almandine - pyrope as crystalline inclusions within the corundums, and the existence of augite, kyanite and hercynite suggest a metamorphic origin possibly associated with the granulite xenoliths found in the Granatífera Tuff.