What are Black Opals?
The definition of an opal is "Non crystallised minerals created by silicon dioxide together with water". Opal is a hydrated amorphous form of silica and has a water content of up to 21%.
Opals are found in Australia within the entire area of the Great Artesian Basin. The area of the Artesian Basin outlines the vast In-land Sea that once covered a large part of Australia some 110 Million years ago.

Black Opal is a precious gem stone that's found only in Australia in the past 100 years. This is quite a recent find compare to other stone. The creation of Black Opal has been radically reduced the previous couple of years. This is because Black Opal is extremely tough to locate and many Lightning Ridge (Black Opal area) miners have abandoned the area with empty pockets. It's now nearly impossible to run the machines because of the high price of petrol, in addition to all other expenses.

The kinds of question that are asked many times seeing Black Opal is "I have never seen this sort of opal. Is this man-made ?" Or "The colour is not natural, is it ?" . Even though the Black Opal has gained its popularity in contrast to 10 years back, we believe you will find many might still feel that Black Opal isn't natural gem.

The reason many individuals have a fascination for opal, is its colour. Especially the Black and Boulder Opal from Australia, we can say that every stone has a different and exceptional colour (There is not any identical colour stone). Additionally, even one individual rock can produce a variety of colours depending on the light or which way you look at it.The internal structure of a precious Opal makes it diffract light. Precious Opal is composed of Silica Spheres, these Spheres produce the internal coloursby causing the interference and diffraction of light passing through the micro-structure of the Opal.

More than 90 percent of the world's precious opals come from Australia, and the remainder is seen in other areas of the world such as Mexico, Brazil, Indonesia, Czech Republic, Ethiopia and USA.
About 10 hours drive from the Gold Coast, there's a small but famous city called "Lightning Ridge". This city is the only place in the world that produces this valuable Black Opal.Depending on the conditions in which it is formed, an Opal can display many colours of the Colour Spectrum. ..But because of the hues in which the Black Opal displays, makes the Black Opal the rarest Opal in the world, and therefore, the most Valuable!

The first recorded Black Opal found in Lightning Ridge was in 1873. But Until 1903, people weren't aware of its value. From that time until today, Lightning Ridge is the only place you can discover this magnificent gem, Black Opal.

Some people may believe Black Opal comes in a Black color(?) , so they're very often amazed by these gorgeous colours it actually has. Why is it called "Black Opal" ? We begin from this point.
For at least 500 million years of its geological history, Australia was embedded in the early southern super-continent of Gondwana. At this time an inland sea covered central Australia, and silica-laden sediment deposited around its coastline. It is believed that perhaps 30 million years back, plenty of silica was released to a solution which filled cracks in the rocks, layers in clay, as well as some fossils. A number of these became precious opals. It requires about 5 to 6 million years to create a 1 cm opal to mature.

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