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Search Results - Gemstones, October 2018
your search of 'Gemstones, October 2018' has 1 result.
01/10/2018
• Jennifer Suggett
Topaz has been known as a gemstone for at least 2,000 years. It occurs in a range of colours and has hardness of 8 on the Mohs scale, however it can be brittle. JENNIFER SUGGETT investigates.
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