Please see 84 mark and St George mark to the bale - two photos shown
6.91 grams
27mm total length
15mm wide by 18mm tall approx measured across one side of the egg locket when open.
Genuine handmade hallmarked Russian egg dating to the late 19th century about 1890 or so in overall good antique condition - firing blemish to the enamel, some age commensurate damage to the enamel, two missing white topaz easily replaced - these are just under 2mm. 
Pendant opens and closes with a nice click.
THIS IS A REALLY EXCEPTIONALLY RARE PIECE....not a reproduction...not in the style of but a genuine 19th century Russian handmade silver gem set and enamel pendant.
Make an offer welcome....