Tuesday, September 15, 2015

Ethiopian Opal has the same molecular structure as Austrailian Opal. They are basically hydrated forms of Silica in a a unique formation. This formation does not crystallise in a regular form, and is called amorphous.
The main difference in Australian and Welo Opal is how much water they contain. Australian Opal is found deeper, so it has more pressure exerted on it and contains more water. Australian Opal is usually about 6% to 10% water and Welo Opal is closer to 3% to 5% water. Australian Opal has a tendency to dry out but Welo Opal can actually absorb more water.

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