Opal is the national gemstone of Australia, which produces 97% of the world's supply.
This includes the production of the state of South Australia, which accounts for
approximately 80% of the world's supply.
The internal structure of precious opal makes it diffract light depending on the
conditions in which it formed, it can take on many colors. Precious opal ranges from
clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate,
olive, brown, and black. Of these hues, the reds against black are the most rare, whereas white and greens are the most common.
"OTHER BEAUTIFUL COLOR'S"
