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1.135 carat Round Cut

6.25mm x 4.05mm

Half a million carats of Red Emerald exist on Earth, and over 95% is still underground. This led the National Jeweler's Association to name Red Beryl the "Rarest Gemstone in the World".

Prior to 2006, they considered the scarcest stone Benitoite -- a bright blue gem produced from a single location in the United States (much like the Red Emerald). A small area in San Benito County, California (where Benitoite was first reported in 1907) remains the only place crystalline material has ever been found.

Benitoite is a Type II gemstone in the Gemological Institute of America's clarity classification system. This means Benitoite contains the same level of inclusions found in an unheated Sapphire.

Benitoite has a high specific gravity, making it denser than diamond…though not as hard, rating 6.0 to 6.5 on the mohs scale. A one carat Benitoite is smaller than a one carat diamond, and they are difficult to obtain in sizes larger than a carat. These unique gemological attributes helped make Benitoite the state gemstone of California in 1985.

Benitoite is commonly found in shades ranging from dark violet to pale blue, but more-rarely, white and colorless stones are seen. Inclusions of white or blue crossite fibers are often found in the natural crystals, and "streaks" of blue can be seen in this particular example under magnification, but these are invisible to the naked eye, disappearing at arm's length!

The color and refractive index is similar to Sapphire, but Benitoite is unresponsive to heat. Clarity and color does not improve with thermal treatment, so every stone is completely natural and unenhanced. However, the rarer White Benitoite permanently transforms into a bright neon-orange if exposed to high temperatures! Benitoite fluoresces blue under short-wave ultra-violet light, and glows red under exposure to long-wave.

This is the largest pure white benitoite I've ever encountered. It is truly an incomparably rare gem.

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$12,500 USD

7.15 oz Gold / 455 oz Silver

0.3125 BTC