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2825 Sand Hill Rd
Menlo Park, CA, 94025

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Stephen Silver is renowned for our extraordinary ability to procure, design and handcraft the world's finest jewelry and gemstones.

The Stephen Silver Fine Jewelry Estate Collection includes some of the finest pieces from the Edwardian, Victorian, Art Deco, Art Nouveau, and Retro eras. Signed and period pieces are the company's specialty; many of which are from prestigious jewelry houses such as Cartier, Van Cleef & Arpels, Bulgari, Tiffany & Co., and Harry Winston.

The Stephen Silver Fine Jewelry Signature Collection exemplifies modern day luxury combined with old world elegance to produce true works of art. Exquisitely handcrafted in platinum and 18-karat gold, using only the very finest diamonds and colored gemstones, our Signature Collection is exceptional in quality and extraordinary in style.

Lucara Offers First Glimpse of Its Spectacular 336-Carat Diamond


Lucara Offers First Glimpse of Its Spectacular 336-Carat Diamond

Corey McCarthy

Last week, Lucara Diamond Corp. announced the discovery of a spectacular 336-carat diamond at its Karowe mine in Botswana, but didn't provide photos. Yesterday, the company unveiled the $15 million rock on its Facebook page, and all we can say is "Wow!"


In its natural state, the diamond has a surprisingly symmetrical shape that resembles a rough-cut finished gemstone. This is the second 300-plus-carat diamond to be pulled from the Karowe mine in just the past five months.


Experts believe that the Type IIa diamond could yield $15 million or more when it's offered at Lucara's next tender in September. The buyer will determine the shape of the polished stone, hoping to maximize its size while bringing out its optimum brilliance. It's not unusual for half the diamond's weight to be sacrificed during the arduous cutting and polishing process.

The 336-carat diamond is rated Type IIa, the purest of all diamonds because they are composed solely of carbon with virtually no trace elements in the crystal lattice.

It was one of five notable diamonds — four white and one pink — unearthed at Karowe recently. The other white diamonds tipped the scales at 184 carats, 94 carats and 86 carats. Combined, they're expected to fetch $10 million at the September tender. A 12-carat pale pink diamond should also get buyers' attention.


Botswana's Karowe mine continues to generate a bounty of massive high-quality diamonds. Back in April, we reported on Lucara's discovery of a 341.9-carat specimen, also of Type IIa clarity. Lucara offered that stone at its July tender and it sold for $20.55 million.

Over the past three years, Lucara has recovered 216 diamonds that have sold for more than $250,000 each, with 12 of these yielding more than $5 million each.

Credit: Images via Facebook/LucaraDiamondCorporation