22mm diameter ring 10/5mm marquise stone. 

Available on https://www.cgtrader.com/3d-print-models/jewelry/rings/barahir-aragorn-ring

(…) green jewels gleamed there that the Ñoldor had devised in Valinor. For this ring was like to twin serpents, whose eyes were emeralds, and their heads met beneath a crown of golden flowers, that the one upheld and the other devoured; that was the badge of Finarfin and his house. Aragorn ring based on Tolkien work

Barahir Aragorn's ring

Two chinese style rings, you can use jade silver gold platinum

CHINESE RING

SIMPLE_CELT

This cheetah will run around your fist

https://arqreation.com/

PATRICK DAYER