Sunday, June 11, 2017

trade in precious stones and gemological laboratories


"Kashmir sapphire", in fact originating from Madagascar, get on the gemstone market in larger sizes and quantities.
Recently, the Swiss Gemmological Institute (SSEF) has analyzed a large number of new deposits of sapphires Bemeynti (Bemainty), located near the small town Ambatonrazaka on the island of Madagascar. Stones were provided laboratory several reliable independent sources.
Sapphires are strongly reminiscent of "Kashmir" in appearance, and in the same way as the original stones, characterized by slight haze that causes their velvety blue color characteristic of high-quality sapphires from Kashmir.
Unfortunately, many of these new Sapphire accompanied by gemological certificates describing their Kashmiri origin. But lab recently tested such "Kashmir" sapphire weighing from 5 to 50 carats, I came to the conclusion that they came from a new deposit near Bemeynti / Ambatonrazaka Madagascar. When checking the sapphires used carefully microscopic observation, as well as a number of complex scientific techniques, including Raman microspectrometers.
Hit the market a large number of new "pseudo-Kashmir" sapphire looks challenging for the segment of trade in precious stones and gemological laboratories, especially since some of these sapphires from Madagascar deliberately introduced to the market of precious stones with fraudulent statements about of historical origins in Kashmir.
http://digg.com/u/jetjewelry

1 comment:

Pearl Necklace said...

Ministry of Geology and Mines of Angola reported that in October of this African country exported 624,000 carats worth $ 86.1 million.
Macauhub, citing data released by the ministry said that the average price was $ 138 stones per carat.
This figure fell to 16.9% compared with the same period last year.
Angola exported 751,100 carats in October 2014, having received from the sale of $ 144.5 million.
The average price of diamonds in the past year amounted to $ 192 per carat.
Meanwhile, 800,000 carats in October this year it was produced in Angola.
In October of diamond mining in Angola was performed on 10 of the 12 operating in the country of mines. Mine Catoca (Catoca) in Lunda Norte province in the lead on the production figures, which amounted to over 576,776 carats per month.
Angola received $ 1.274 billion from 8.6 million carats, sold last year.