Old-cut diamond, cabochon sapphire, rectangular with rounded corners, the interior with facsimile signatures, silver (Kokoschnik mark), Saint Petersburg, 1904 - 1908, maker’s mark (Cyrillic 'G. D.')

Size/Dimensions: 9.4 x 6.6 x 1.5 cm
Gross weight: 152.1 grams

Christie's Geneva, November 2018, sale 16112, lot 47

The samorodok technique was very popular among Russian silversmiths who tried to achieve the texture of silver or gold in its natural state. This nugget-like surface is obtained by heating gold or silver to a temperature near the melting point and cooling it in cold water.

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