by Richard | Oct 28, 2015 | Birthstone of the Month
Opal displays a particularly interesting optical effect known as ”play of colour”. Opals structure holds the key to this amazing display; being formed from micro spheres of silica between 150 and 300nm in size, light hitting the gemstone is diffracted by...
by Richard | Oct 6, 2015 | Latest News
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by Richard | Aug 28, 2014 | Latest News
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