Jan 10, Famous Diamond and Jewelry Collections -Internet Stones.COM
A comprehensive description of the famous diamond and jewelry collections of the worldRead More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]
Archive for January, 2008
Feldspar (Part 3)
Compositions of the plagioclase series have been labeled as follows (percent anorthite in parentheses):albite (0 to 10)oligoclase (10 to 30)andesine (30 to 50)labradorite (50 to 70)bytownite (70 to 90)anorthite (90 to 100)Intermediate compositions of plagioclase feldspar also may exsolve to two feldspars of contrasting composition during cooling, but diffusion is much slower than in alkali […]
Jan 10, Aurora Diamond Collection-Internet Stones.COM
The Aurora Diamond Collection is the most comprehensive collection of naturally colored diamonds in the worldconsisting of all the multifarious colors in which diamonds exist in nature, represented in different shapes,sizes,color saturations,as well as modified colors.Read More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]
Jan 6, Moussaieff Jewelers Unnamed Blue Diamond-Internet Stones.COM
The 6.04-carat, fancy vivid blue, internally flawless, unnamed blue diamond purchased by Moussaieff Jewelers, at a Sotheby’s biannual auction held in Hong Kong in October 2007, set the world record for the most expensive diamond per carat,smashing the 20-year old record held by Hancock diamond.Read More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]
Jan 7, The Lady in Red Diamond-Internet Stones.COM
The Lady in Red diamond is a 0.54-carat, puplish-red, round brilliant-cut diamond with a clarity grade of I-1and discovered in the Argyle diamond mines in 2006.Read More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]
Feldspar (Part 2)
Compositions
This group of minerals consists of framework or tectosilicates. Compositions of major elements in common feldspars can be expressed in terms of three endmembers:K-feldspar endmember KAlSi 3O 8Albite endmember NaAlSi 3O 8Anorthite endmember CaAl 2Si 2O 8Solid solutions between K-feldspar and albite are called alkali feldspar. Solid solutions between albite and anorthite are called […]
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Jan 5, Graff Purplish Red Diamond-Internet Stones.COM
The Graff Purplish Red diamond is a 2.26-carat, brilliant-cut, octagonal shaped red diamond, the largest red diamond everto appear at an auction, and sold for $ 2.67 million, the highest price ever paid for a red diamond at an auction.Read More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]
Jan 4, Star of Happiness Diamond-Internet Stones.COM
The Star of Happiness diamond is a 100.36-carat, radiant-cut, D-color, internally flawless, diamond purchased by Sheik Ahmad Hassan Fitaihi at an auction in Geneva in November 1993 for $11.8 million.Read More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]
Jan 5, National Gem and Jewellery Authority Sri Lanka(NGJA)-Gem Talk
The National Gem and Jewellery Authority(NGJA) of Sri lanka is dedicated to the success of the gem and jewellery industry in Sri Lanka.Sri Lanka Gemstone and Jewelry industry has been growing rapidly over the past few years,sales online and offline have increased dramaticallyRead More… [Source: Gemstones,gemstone Jewelry,Gifts,Diamonds Internet Stones.COM]