A russian lapidary jewellery casket

A very rare Russian lapidary specimen marble jewellery casket, veneered with chamfered squares and rectangles including rhodonite-orlez, kazakhchikan jasper, kalkan jasper, koshkuldinsk jasper, chebarkuls jasper, kushkudin jasper, sarbaya jasper, listvenite berezovsk deposit, lazulite (Ural lapis lazuli) etc… ; on four lapis lazuli of Badakchan ball feet. Most identifications were made through the wonderful website of Paul Dyson.
Maybe by the Ekaterinburg Imperial Lapidary Works.
Inside silk lined, 19th century.

Literature :
-) “Russian decorative arts”, Cynthia Coleman Sparke.
-) www.russianimperiallapidary.com/identify-your-stone/
Comparanda :
-) Hermitage Museum - Casket with inventory number ?PO-6454