In the shade of the dark body, the color is bright, we call it black opal. 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.
The choice of black opal must first look at the color of the gemstone. The single blue black opal is generally the cheapest, the green is expensive, and the red is the most. If a jewel can be in a variety of colors, flawless, colorful, bright, and color graphics, this gem is the top black opal.
In the picture below, all five are blue black opals, and the price rises straight from left to right. The left one is one of the cheapest opals, the overall gray-blue, and no light gray, very small, only visible at a few very small angles. The second left sells in general, the brightness and color change include the price is very general. The opal in the middle is brighter and brighter, and the angles are different, but the color is single. The right second win is very bright in the whole body, and there is a large reflection and color change. The first one is the top grade, the overall color change is obvious, the blue and green intersect, and the color change graphics are unique.
Then there are 5 green opals, which are also increasing from left to right. The left one is very dark, and the color type is the most common spark, almost unchanged. The second left is bright, the color change is not too big, the color pattern is good, but there is black inclusion in the gem. The middle is brighter, with yellow and green. The second right is very splendid, the color-changing graphics are also good, ribbon-like, but the range of color change is not big, only green blue plus a little orange. The right one win is very bright in the whole body, the color change is obvious, and the color change range is large.
It's not that as long as the red opal is a good gem, the focus is on the individual color. The value of the red opal from left to right in the upper floor is doubled. The left one has only a single red color change, and only appears at a certain angle plus the surface of the gemstone is gray, which is actually the lower part of the red opal.
The second left is brighter and the color change is obvious, but the color change range is not large. It is only between red and orange. When viewing at different angles, some angles have poor performance, and the overall color of the gemstone is too gray, which is a middle and lower product. The left third is the middle product, the color is bright, the color is obvious, the color pattern is various, but the color change is not enough, only between red, green and orange, and the body color is still some gray.
The right three body color is good, black enough, although not very brilliant, but the cross-color effect is very obvious, each angle has a good performance. The second right is very splendid, the color is beautiful, the color is bright, and it can reflect the characteristics of Opal's illusion, but it is a pity that the body color is gray. The right one is top grade in my eyes. It is bright, the body color is black enough, the color range is large, the flower pattern has characteristics, and each observation point has absolutely different color performance. Up to now, I can't tell the basic color of the gem. Under different light angles, the gemstones are unpredictable. If the color of the gem is more brilliant, it can be called the best.
The pattern of the gemstone has a great influence on the value of the gemstone. Like the left-hand fire type in the figure, it is a common pattern, which is generally not very expensive. The left two large pieces of reflective shape are also more common. Others are more distinctive, like diamond-shaped interlaced, floral patterns, plates or mixed patterns.
The color of the gemstone has a great influence on the color performance of the opal. From left to right in the figure below, the color of the gems is darkened from light gray to black. The approximate brightness, graphics or color change, the deeper the body color, the more obvious the color change intensity, the higher the value of the gem.
When choosing Opal, be sure to carefully observe the surface of the gemstone for cracks, flaws (like gypsum lines, inclusions), whether the gemstones are uniformly colored in 360 degrees, whether there is a window with color change, and whether the shape of the gemstone is weird (for example, too thin, Less than 2mm thick). Any defect on the surface of the gem will cause a sudden drop in the value of the gem.
Come to an artificially blackened African Opal map. Their unified features, three primary colors, green, blue, brown and brown. The whole ones are full, round and round, the color layer is very thick, there is almost no background layer, and the body color of the stone is uniform from the side.
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