Black Spinel Solitare Stone 11 86 tcw!! Unheated. This luxurious gemstone exhibits a silky black diamond hue accented with a glistening luster. It has a beautifully opaque body with total color saturation, and measures an impressive 15.0mm x 6.7mm making it a statement piece that will be the talk of the room. This untreated example was sourced from Thailand.