The color of Opal Stone is like a flower and a fire. In short, it is colorful and has many kinds. But these opal stones are not of the same grade, they are graded. The simplest is that there will be different levels depending on the color. The following is a small series of China Jewelry Merchants Network to introduce the grade and classification of Opal Stone.
Opal stone grade
The highest level of opal stone is black opal. The "black" here is not a black gem in the conventional sense, but an embryonic hue of opal. The black opal has a dark blue, dark green, and black background. The high-quality black opal can make the shimmering rainbow light very dazzling, Australia is the most famous black opal origin, such as the Australian lightning mountain. The price of black opal is also 10 times that of ordinary white opal, and the price per carat is higher than diamonds. Because of their scarcity, the high price is very stable. It is also the highest grade among opal stones.
The rank of opal stone is followed by white opal stone. The white opal has a very light background. Generally, it is processed into jewels and needs to be back-sealed to maximize the effect of color change. Good white opal is the strongest kind of color change, so the price of white opal is also very high, ranking second only to black opal.
The classification of opal stones is again the jelly opal. Listening to the name is very cute and beautiful. In fact, jelly opal is a breed with half black opal. The transparent blue-gray base has an amber body color, and its color change is a beautiful blue-violet color. The price of expensive jelly opal is very high, but the color change of jelly opal is usually not so strong. If you can encounter strong color change, don't miss it.
The last of the high-grade rows of Opal Stone is the fire opal. The color of the fire opal is from yellow to red, while the bright red is the most expensive in the fire opal. However, the color change of the fire opal is not obvious, sometimes there will be light green fluorescence, the quality is more transparent, and has a glassy luster. Fire Opal is very popular in the US market.
Classification of opal stones
Opal is the transliteration of its English name Opal, derived from the Latin Opalus, meaning "a collection of gemstones." Because its most famous origin is Australia's "Lightning Ridge", it is also known as "Flash Mountain Cloud" or "Flash Hill". Opal is an opal mineral, and only gem-quality opals can be called "Opo". The quality of the opal is as bright as the rainbow after the rain. When it turns, there will be a variety of magical brilliance and gorgeous colors, which is dazzling.
According to the different background colors of Opal, they can be divided into three categories:
1, black opal
Also known as "Black Mountain Cloud", it is an opal gemstone that is strongly colored on blue, dark blue, black, gray-black or green base. It is the most precious variety in Opal.
2, white opal
This means that its preciousness in white or gray is second only to black opal.
3, fire opal
Also known as fire opal, it refers to an opal gemstone that exhibits a small amount of color change on a red or orange-red base. In the gem market, opal is expensive and belongs to high-end gemstones.
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