Gemological Institute of America3年
Yellow Synthetic Sapphire Colored by Trapped-Hole Mechanism
Figure 1. The UV-visible spectrum of this yellow sapphire shows broadband absorption features below ~500 nm, originating from trapped holes associated with Mg and Cr. The DiamondView image clearly ...
National Herald3 日
The World's Second Rarest Gemstone, Gold Sheen Sapphire
The Gold Sheen Sapphire, a recently discovered gem, has swiftly claimed the title of the second-rarest gemstone on Earth. Its ...
SiliconIndia4 日
Golden Sheen Sapphire: The Second Rarest Gemstone In The World
The Second Rarest Gemstone In The World - In the vast world of gemstones, only a few manage to captivate the imagination of ...
Gemological Institute of America8年
Sapphire Quality Factors
This sapphire from Kashmir has an intense velvety blue color. – Photo: Robert Weldon/GIA. Sapphire is one of the Big three of jewelry colored gemstones—the other two are ruby and emerald. A durable ...
Woman & Home1年
The most iconic sapphire jewels worn by the Royal Family
To celebrate the 'September stone,' we look back at five of the most iconic sapphire jewellery pieces worn by the royals throughout the decades. Stepping into September, we enter the month of the ...