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