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June 16, 2018
The First Gemstone-Shaped Coin Issued in Switzerland
A coin in the shape of an emerald was issued in Switzerland. The idea belongs to the company Helvetic Mint, which is a coin factory. The face value of this coin is 2 dollars, and it is made of silver of Ag .999 pure silver.
June 11, 2018
Opsydia Has Developed an Innovative Technology for Marking Diamonds
Opsydia (University of Oxford spin-out) has developed a new technology for making marks inside diamonds.
June 09, 2018
Colors of the Magnificent Jewels and Jadeite Auction: A Review of 5 Exquisite Items
Magnificent Jewels and Jadeite auction was an important and highly-anticipated event. Sotheby’s auction house has selected exquisite items, each of which was worthy of attention.
June 07, 2018
Verifying the Authenticity of Russian Gold
Gold items created during the existence of the Russian Empire are marked with the number 56 (as seen on the ring). Apart from the millesimal fineness mark, the item must have the coat of arms of the locality or the initials of the jeweler engraved on it.

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Russia: Most Valuable and Rare Stamps
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Rare and Valuable US Stamps and Postal History
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Rare and Valuable Stamps of Germany
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The One and Only British Guiana 1c Magenta: Part II
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Stamp Errors Review: Part I
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The Most Expensive Antique Items Ever Sold: Part I
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The Most Expensive Photos Sold at Auctions: Part I
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