Black Opal is the most famous and expensive opal variety produced in Leiden Ninrich, New South Wales, Australia. Black opal does not mean that it is completely black, but its body color is darker than that of the opal with a lighter body tone. Natural black opal is a royal family in opal, and because of their shape and scarcity, prices are usually very stable. Black Opal is also the highest quality opal in the world. So what is the real black opal? Why is black opal not black?
Black opal
A good black opal, there is no black shadow, then a friend is strange that there is no black shadow in black opal, so why is it called black opal? Xiao Bian was also confused when he first started to contact. Let 's let Xiaobian of China Jewelry Merchants Network take you to know what is the real black opal .
When observing opal, it actually sees all the colorful colors in the natural spectrum produced by the diffraction of light, so its color is actually an optical effect! These colors can appear on one opal at the same time. The color combination changes with the angle of the light. That is to say, the picture seen at each angle is different. Black Opal, 360° different angles present different colors and patterns. We are called black opal in the dark color of the body color, and black opal does not mean that it is completely black, but its embryo body is compared to the opal whose body color is lighter. The color is darker. However, in the strict sense of the precious black opal, it is specifically because the body color is dark and reaches a certain brightness, and the color present is at least one of the high-grade colors of red orange and yellow, which can be called gem-level black opal!
The shade standard of N1 to N9 does not mean that the body color is between black and white, but it represents the depth and cannot be absolute.
Color opal
1. About the form
Australia's Lightning Ridge produced 97% of the world's black opal (so it is not only produced by LR). Black Opal is a representative of Australia's opal. It is also very special in the Opal world, especially for them. Body color table, N1-N9 division, and fire color brightness table 1-5, where N1-N5 are called black opal, N6 and above are gray/white opal, but the actual situation is that N7 is also Counted as black Europe, because there is no so-called gray opal!
N1 blue green black opal
Colorful black opal
It is not difficult to understand that it is true that in fact, the black opal, the white opal is actually only the difference in body color, and the main reason for this difference is that there are a lot of dark minerals mixed in the opal, because the Opal body is Opal, the main color is egg white or transparent. Whether black or white, it is possible to overlap with the crystal attributes! That is to say, black crystal opal is a normal phenomenon. Even a lot of crystals that look very bright are actually black Europe. Don't think that black Europe must be a black piece. (The whole country is still not used to black gems. I always feel a sinful atmosphere, which is mainly the cognition left by the Chinese 5,000 years.
N2's black opal, in fact, in many cases, the front is not very good to tell the depth of the depth (of course, you can see the back decision)
Black Opal of N2
2, about value
In black opal, the whole piece of natural black opal has the highest value, but most black opals are natural double layers, that is, a layer of black opal attached to other minerals, so don’t think that double-layered stones are not Good things, as long as they are natural, will not be bad, so buy a double layer must be sure whether it is natural, the price difference is much better.
N3's black opal, very beautiful, especially bright.
N3 black opal
Because good black opal may be rarer than diamonds, so there is considerable appreciation space and collection investment value. In Australia opal, red is the rarest color, followed by orange yellow purple green blue, then different color lines, color The better the grain, the higher the rarity, the greater the value, and even the combination of color and grain, which is even more valuable.
N4's black opal, already a bit subtle, is not very 'black'.
Black Opal of N4
3. Double layer, three layers for post processing
Double-layer opal is generally a good black opal, but because it is too thin to be polished into a gemstone, a technique is used to protect the opal by attaching a thin mine to the black stone. However, in the technology is getting better and better nowadays, more and more double layers are used on the Onyx stone to paste a layer of black European lines, only looking good, so the price began to fall, of course, the specific situation, can not be generalized .
N5's black opal, spanning. . . No longer black! But it still belongs to the 'black' part.
Black Opal of N5
As for the three-layer stone, it can be said that it is a complete artificial gem. It can not be counted as a gem in the market, but as a handicraft, because the so-called third layer is a very thin layer of opal wrapped in glass or plastic on the surface, the legend 1 mm. A thick piece of opal can provide more than 10 three-layer stone materials! ! It can be imagined that this kind of Opal has no more opium, just the crafts with Opal's face, the market price is generally 1,200 yuan, but the legend will be broken within a few years.
The black opal of the N6-N7, the normal concept can not be considered black Europe, but should be said to be gray.
Black Opal of N6
Black Opal of N7
Africa's Welo Opal has a lot of new color lines because of its translucency. Of course, this is a digression. In addition, there are some real black opals in the African Welo Opal recently! But the body color did not reach N1, mostly near N3, so, as I said before, African natural black Europe is now appearing, but only dark gray, no pure black, pure black is smoked goods! The African Opal is just the opposite of the Australian Opal. The red is the most common and the blue is rare. . So blessed friends who like anti-tone, and the price is much cheaper, similar to the price difference between African crystal and Australian crystal.
The black opal of the N8-N9 is basically white.
N8 black opal
Black Opal of N9
In fact, it is not difficult to see that from the N3, sometimes black Europe will also appear translucent. This is the so-called crystal black Europe. The concept of black Europe is actually an opal with a lot of dark iron ore, so whether it is white opal or Crystal Opal will be black opal.
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