If you appreciate beauty, pursue affordability and fascinated by technology ... Gilson opal is created in controlled laboratory conditions similar to what might be found in nature. The colors are natural and a harvest is now possible in 18 months. They have virtually identical chemical composition, physical and optical properties to that of the natural opal. The exception is that it is harder and more durable than its natural counterpart because, unlike natural opal, it does not contain water.
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