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Opal, because of its color, luster its unique name. Its rainbow-like colorful light colorful like its shiny mosaic, full of mystery, enough other precious stones unparalleled.
Although known as opal, they are not a single tone, if only white, inverted but not value. Opals have a light or dark body color that may be either translucent or transparent. The opals we see most often in jewelry have a milky-white base with varying flashes of color. Transparent, red, yellow color, mostly in Australia, opal, blue color, which has a color like peacock，the feather is a little mystery, known as black opal and the Pearl black crystal opal necklace is very beautiful, the price so high. Precious opal is a gemstone that exhibits flashes of rainbow-like colors when viewed from different angles. The colors are created by an arrangement of silica spheres within the opal. Common opal does not have this flash of color. Black opals are the most rare and expensive opals, with a body color that can range from dark grey to black with fiery flashes of color. Precious fire opals are another alternative. They have base colors ranging from yellow to orange, and can be transparent to translucent with fiery flashes.
Opal is a jewel containing silicate component. Be able to bloom out as a glorious rainbow, the amount of the high price. Opal by electron microscopy observations, can be found within the particles contain carbon dioxide, neat and lined with thick, particle voids containing water, when the light after injection, it will break down into seven kinds of color, showing a Beautiful stunning rainbow-like light.
Australia is the leading source for opals. But a great number of fire opals are found in Mexico. Other sources of precious opals include Africa, the United States, Brazil, areas of the former Soviet Union and Nicaragua.
Opal doublets and triplets are composite stones that are made by positioning a thin layer of opal on top of a chunk of glass or less expensive gemstone. To find a composite, inspect the sides of an opal, looking for indications that it's really a stack of layers. You can also check the stone's base to see if it matches the top. If it doesn't it might be a composite.
The method of maintains:
It must be placed in the shade to save. Because eggs contain a large number of stone water in the sun or bright light for too long will be exposed to dehydration cracking.
Using the hair dryer and so on electrical appliances or spraying perfume chemicals, it is best to avoid wearing of opal jewelry such asopal necklace or opal bracelet.
Some thin opal can be placed in the water every six months for some time, as the maintenance.