- White or light opal: Translucent to semi-translucent, with play-of-color against a white or light gray background color, called bodycolor.
- Black opal: Translucent to opaque, with play-of-color against a black or other dark background.
- Fire opal: Transparent to translucent, with brown, yellow, orange, or red bodycolor. This material—which often doesn’t show play-of-color—is also known as “Mexican opal.”
- Boulder opal: Translucent to opaque, with play-of-color against a light to dark background. Fragments of the surrounding rock, called matrix, become part of the finished gem.
- Crystal or water opal: Transparent to semitransparent, with a clear background. This type shows exceptional play-of-color.
*courtesy of Gemological Institute of America
Ring Details:
- Ethiopian Opal – 7.07ct
- Ten F/C Diamond Melee: 0.23cttw
- Size: 6.5
- Weight: 10.38 Grams