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Unheated Sapphire Earrings pink yellow from most famous Ilakaka Mine Madagascar

About the Item

untreated NATURAL COLOR sapphires in overwhelming colors...always a rarity because most sapphires are heated, stud earrings classically set in 585 yellow gold, 4 sapphire drops in different colors pink yellow total approx. 1.12 ct, AAA+, Ilakaka Mine Madagascar, very good cut, held floating by 3 crabs, made of 750 yellow gold, earrings dimensions approx. 11.5 x 4 x 15 mm, weighs approx. 1.41 grams, all information was checked by a jewelry appraiser for authenticity and quality information, each one Customer receives an invoice with VAT and detailed description, new production!, finest gemstone jewelry! Expertise (surcharge of 20 euros) The Ilakaka-Sakaraha deposit is one of the world’s largest alluvial sapphire deposit, covering an area of approximately 4,000 km2. Starting from the Ilakaka river basin and then going southwest for roughly 120 kilometers, onto the Benahy and Taheza rivers basins. The alluvial sapphire-rich layer is located under a sandy ground overburden, which varies considerably in depth, from a meter up to 60 meters in thickness. The depth of the gem bearing layer will determine the type of mining technique used to retrieve the sapphires: If the depth is less than 10-15 meters, an open-cast quarry technique is often employed. These quarries can reach impressive dimensions. The “Banque Suisse” mine near Ilakaka is probably the most famous of these quarries; exceeding 20 meters in depth and having been entirely dug out manually, using the “angady”, a Malagasy light agricultural shovel. When the depth exceeds 15 meters, the preferred method is to dig narrow vertical pits, locally called “vovo”, down to the alluvial layer and then dig horizontal tunnels to recover the gravels. In the Taheza area, these mining pits can reach 50 meters in depth

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