GIT Gem and jewelry
Gold Sheen Sapphire Article on GIT Gem and Jewelry Magazine
The corundum gems such as ruby, sapphire, and other colored sapphires have been popular for a long time. Apart from the group of clean and clear stone, there is another very popular group of stones which have exhibited various optical phenomena, such as star and color change. Mr. Tanzim Khan Malik, the owner of Genuine Gems & Jewellery Co., Ltd., is the leader in introducing sapphires with the new appearance of gold sheen phenomena due to the reflection of light from many metallic mineral inclusions within the stones.
Nowadays, gemstones with this phenomena are sold in the market as “Golden Sheen Sapphire” and becoming well-known in the jewelry market. These sapphires were introduced to the market by Mr.Tanzim Khan Malik at Hong Kong Jewelry and Gem Fair, September 2015, under the name of “Golden Sheen Sapphire”. He claimed this particular gem to be found, since 2009, around the eastern part of Kenya near the border of Somalia, in Africa. The intensive improvement of the cutting techniques accumulated for years by him has brought the beauty of the sheen effect to these sapphires. These gems have been popular among the buyers from Europe (United Kingdom, France, Switzerland, Belgium and Germany), Asia (Taiwan, Hong Kong, Korea, Japan, China and India) also America and Australia.
The prominent colors of Golden sheen are golden-yellow and blue with a golden glow. At present, The export percentages for this kind of gem in each continent is 40% Europe, 40% America, and approximately 20% Asia, according to Mr. Tanzim Khan Malik. These sapphires are most often found with a golden-yellow body color. However, the stone have also been found in greenish, yellowish, grayish and blueish color.
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The chemical composition is Aluminum oxide (Al2O3) with a Hardness of 9 according to the Mohs scale, specific gravity (S.G.) of approximately 4, and a refractive index (R.I.) of 1.770 – 1.762. The quality of this kind of gem depends on the Sheen effects caused by the reflection of lights on internal metallic inclusions. The cut must be only in the right angel to exhibit the sheen. Then, the color of the gemstone is next considered. The golden-yellow is the most desirable, especially in Asian countries. Furthermore, besides of sheen sapphire, some star sapphires can be found as well.
Currently, the quality of Gold Sheen Sapphire doesn’t have an internationally recognized standard of evaluation. That means, sales and purchases of this kind of gem, at present, depend on the favor and the satisfaction of both buyers and sellers. For ensuring buyers and seller’s confidence, GIT Gem Testing Laboratory can issue a certificate of examination results as shown.
Interested Readers can find more information by contacting GIT Gem Testing Laboratory, The Gem and Jewelry Institute of Thailand (Public Organization), 4th Floor, ITF Tower, Silom Road, Suriyawong, Bangrak, Bangkok, 10500, or for more information, please call +66 2634-4999 ext.
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