OPAL is called "Opal" or "Obao" in Chinese, and its gemological name is Opal. It is the birthstone of October and is a stone symbolizing hope and happiness. The color refraction of opal comes from the water contained in the ore. Generally, the water content of opal ranges from about 3% to 20%. The higher the water content, the more obvious the play-of-color phenomenon will be. Opal is formed slowly under low temperature conditions and can occur in almost all rocks, but is generally found in limestone, sandstone and basalt. Australia is the country with the largest output of opals, and opal is also Australia’s “national stone”.
WILLS Serpentine Series
Common types of opal
White Opal
White Opal
Albumin is one of the most common opals, showing a play of color on a white background, like a rainbow appearing among white clouds after rain.
Black Opal
Black Opal
Black albumen appears as a play of colors on a dark background. Opal black protein has the highest reputation in the industry, not only because of its rarity, but also because the play of color can best stand out on a dark background.
Crystal Opal
Crystal Opal
Crystal opal is a water crystal of a transparent mineral. The image behind the gem can be seen through the surface of the gem. It can present a different flavor when set in jewelry.
opal value
The value of opal lies in its fascinating changing colors. This is due to the water molecules in the gem being mixed with other atoms to form various colors, such as iron, calcium, magnesium, copper, etc. Opals generally have glass luster or waxy luster. If the color luster changes with the angle, it is a precious gemstone; therefore, the higher the chroma, the higher the value. In recent years, high-quality opals have become increasingly expensive, with high-color opals sold in auction houses often costing tens of thousands of dollars.