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Question 1 of 5
1. Question
Thermal conductivity tester work on all gemstones.
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Question 2 of 5
2. Question
Tanzanite is a variety of zoisite.
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Question 3 of 5
3. Question
Variety of gemstones are named by their colour.
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Question 4 of 5
4. Question
Natural and synthetic gemstones have the same chemical, optical and physical properties.
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Question 5 of 5
5. Question
Opals can absorb a lot of water.
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