It is difficult to evaluate opal because each stone is unique. In general, opals are rarer than diamonds because there are fewer high-quality opals available than diamonds. The good news is that you can find a gem-quality opal at a great price, especially when compared to a diamond. Some of the rarest opals in the world surpass even diamonds on a price per carat scale, such as The Eternal Flame, the rarest opal in the world.
Opals are in a class by themselves. As a species, opal is so unique that it has its own descriptive vocabulary. More than any other gem, each opal is distinctly individual. Opals are also the most delicate gemstones that are commonly used and require special care.
Black opals are very expensive because they are so hard to find. Gems are formed when a solution of silicone dioxide and water evaporates from the cracks of the sandstone and the darker the tone of the body, the more desirable is a black opal. This composition means that they are more delicate than diamonds. Extreme heat can damage its shine.
The specimen presented at Holts is particularly notable thanks to the shades of red in its “play of colors” (an industrial term that Vargas defines as the range of shades that can be found in a gemstone). Red is one of the rarest shades found in a black opal. The double locking vault door on the way starts to make more sense. In addition, opals dehydrate over time, and hot advertising and positive chemicals speed up the road.
This may be due to a network of scratches on the surface of the opal that destroys the enamel and hinders the play of colors, but a simple polishing can correct this. In fact, the most valuable black opal in the world, the “Aurora Australia”, which sounds like a cruise ship, was found in 1938 at Lightning Ridge, in New South Wales. While it is acceptable to refer to the play of colors of an opal as fire, it is not acceptable to refer to the scattering of precious stones as a “game of fire”. The patterns you see on opals may resemble stained glass windows, butterflies, birds and other natural and artificial shapes.
Indonesia produces a very unusual black opal consisting of reddish specks of color that swim in a translucent but very dark brown body.
diamondplaces the individual on stage or in the spotlight, but Opal provides the entirety in the returned end. These opals acquire their blue color from finely disseminated inclusions of chrysocolla, a copper phyllosilicate mineral. It is also important to know that opals have existed for thousands of years, while diamonds have only existed for about 200 years, and diamonds were discovered much later by people.
This common variety of opal comes in green, lavender or purple colors and can also show a cat's eye. Because the value of most diamonds could be better than that of opals, while large opals are rarer than diamonds, a fantastic huge opal can be much more precious than a small, terrible diamond. However, some scholars believe that many ancient references to opal may have actually been to other gems, such as iridescent iris agate. A triplet adds a transparent quartz top and is a good ring stone, because hard quartz prevents softer opal from being scratched.