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Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. [7]
In 1979, Gemstones Corporation of Pakistan was established to develop the gemstones sector in Pakistan, however in 1997 the corporation liquidated. [3] Now a number of organizations are working in this sector including All Pakistan Commercial Exporters Association of Rough & Unpolished Precious and Semi Precious Stones (APCEA) and Pakistan Gems and Jewellery Development Company (PGJDC).
The topaz in the Field Museum (2009) The Chalmer's Topaz is a topaz gem weighing 5,899.5- carats located in Chicago, Illinois ' Grainger Hall of Gems, in the Field Museum of Natural History . It was named for former Field Museum trustee William J. Chalmers and his wife Joan Chalmers, who established a fund used to purchase gemstones for the ...
If the 4-year-old on your list loves their pet (or their stuffed animal collection), help them treat any boo-boos with the highly rated Melissa & Doug Pet Vet playset.
The deals are just as good during Black Friday weekend as they were on the day itself. AirPods are still at the lowest price of the year, and you can still get a new high-quality TV for less than ...
Below are the primetime rankers for broadcast, cable and premium cable networks in 2024, among total viewers (as well as the top 50 list in adults 18-49).
Topaz on matrix from Dassu in Gilgit Baltistan Brookite and Quartz mineral from Balochistan. Gemstones, also known as semi-precious stones or gems, are minerals widely used in jewelry and for ornamental purposes. Northern and western regions of Pakistan are rich in high quality gemstones. Some of the major gemstones are enlisted below; [4] Peridot
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