Antique lapis lazuli Imperial Egg with silver gilt mount Stamped 84

  

Antique lapis lazuli Imperial Egg with silver gilt mount Stamped 84. A lapis lazuli Russian Egg with silver gilt. The 84 stamp is a Russian stamp for metal content.

The standard for Russian silver is measured in zolotniks: the most common fineness is 84, corresponding to 875/1000 standard. There are also other standards that can be encountered, which include 88, 91, 94 and very rarely 96 (meaning pure silver).