Opal and diamonds are considered "the most beautiful gems". Louis XIV is very fond of opal and is hiding in the Palace of Versailles. Shakespeare wrote in The Twelfth Night: "This miracle is the queen of gems." Humans have long loved the colorful beauty of Opal. Nowadays, in the jewelry market, it has appeared frequently and occupied a place.
Opal
The Opal name is derived from the Latin Opalus, which means a gemstone of all colors, with a psychedelic laser texture and a dazzling brilliance.
Opal stone is charming
In addition to its colorful colors, another special feature is that each color is unique, and almost no other identical opal can be found. From this point of view, it is more rare than diamonds.
Like the Milky Way, it’s more like a bright oil painting.
The main components of Opal are silica and crystal water. Because there are too many similar substances on the surface, it is impossible to use scientific methods to explore. It is all about manpower mining and searching, and there are few, and it is also a rare place in Opal.
Basic characteristics of Opal
1, physical properties
Opal is a hydrate of silica. It is an amorphous structure. It has no certain shape. The composition of the mineral is opal. It is brittle, easy to dry, and the fracture is shell-like. The water content is not fixed, generally around 3%-10%. , but also up to 20%, hardness of 5-6, density: 2.15-2.23g / cm3.
The opal in the middle of the original stone is like the galaxy belt that has been opened.
2, color
Different types of opal emit different colors of fluorescence under long-wave ultraviolet radiation. The opal is generally egg white. If other atoms are mixed in, it can form various colors, such as milky white, egg blue, and black. Opal displays iridescent colors due to different viewing angles, so the fascinating colorful spectrum phenomenon is called "game color."
So the precious opal has several different colors. If the color gloss changes with the angle, it is a precious gem, otherwise it is just a decorative stone. Opal has a typical color-changing effect, and the opal can be seen under the light source to see colorful spots.
The home improvement material Opal is completely different from the color of the Opal Opal.
Opal classification
Gem-quality opal can be divided into three categories according to body color:
Body white translucent to nearly opaque white or grayish white, opalescent white opal;
Body color is black, dark green, dark blue, dark gray and brown, black opal with play color phenomenon;
The body color is a transparent or translucent bright orange-red, fire opal with a weak color.
In addition, some experts also refer to the body color close to transparent or translucent, with a colorless phenomenon opal called water opal. According to the color of the iridescent color, there are gray, black, white, brown, pink, orange, blue, green, colorless and so on.
Opal's value evaluation
Opal's value is based on the base color, color change, sturdiness, and the perfection of cutting and honing. The reason why Opal is fascinating is the colorful and colorful gameplay phenomenon, so the beauty and commercial value of Opal lies in the colorful and colorful gameplay. The game without an opal is the same!
In the market, people like white opal or black opal with red and orange color, followed by black opal with green and yellow color, white opal with blue and purple. In addition to the color, the pattern presented by the game has a certain influence on the appearance and price.
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