This is a very chunky cabochon ring, with a solid silver mount and band, featuring deep set rough blue lapis lazuli stone.  

Other lapis lazuli rings available in my ebay shop.

Handmade in India with 925 silver.

UK size M½-¾

US size 6.5

Setting height 25 mm

Band width 3.5 mm minimum.

Weight 7 grammes.