This is listing is for an oval Gem Silica cabochon.
The dimensions of the Stone car 18 mm by 5 mm and a 6 mm deep. This gemstone weighs 4.5 carats.
This is the perfect song for a ring mounting. It is a beautiful translucenct green color there is a small imperfection on the lower edge of the stone at The shouldn't be a problem as this portion of the stone will be covered in the setting. This material is probably from the Morenci mine. I have a stone in my collection for sometime so I can't be sure of its mine source