The Answer From the many intriguing opal variants available today, black is the rarest. Black opals color can typically range from black to dark grey, but it can also be found in darker shades of blue and green.
What is the rarest color of opal?
Black opal Black opal is the most rare and highly valued form of opal, and has what is called a black (or dark) body tone. Black opals come in every colour of the rainbow.
What is the most expensive colour opal?
Black opal Black opal is the most prized opal and may realise prices over AUD $15,000 a carat. Boulder opals also have a dark body tone. White opals have a light body tone and are generally the least valuable form of opal.
How can I make my opal shine again?
1:325:18How to polish an opal while still set in jewelry - YouTubeYouTube
Why is my opal cloudy?
Fact: Most opals are extremely stable and never crack. Water penetration can eventually cause the glue to deteriorate and the layers to separate, causing the opal to take on a foggy, grey, or cloudy appearance. This fact is the origin of the never get your opal wet misconception.
Does opal fade in sunlight?
These gemstones have a high water content and are relatively soft. Sunlight exposure is problematic for opals because the stones will dry out and crack due to the heat.