Do you know that the opal is considered as the national gemstone in Australia? There is a huge popularity of these opals in Australia as they are uniquely crafted and have appealing looks. It is the hydrated amorphous form of silica and he water content Is between the 3 to 21%. There is a wide range of opals you can find in the market that are designed by the experts to add the value in your life. Black opals are considered as one of the finest opals and you will find them in any jewellery store in Australia.
It is classed as a mineraloid and it is different than crystalline form of silica. It is found with limonite, sandstone, rhyolite, marl and basalt as fissures.
There are many stores you can find in Australia dealing with opals and south sea pearls. They are one of the finest jewelleries and you should definitely go for one to gift your loved ones or for yourself.
To know more, you can visit http://www.johnstonopals.com.au
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