Moissanite is a stone that is very similar to diamond in both appearance and hardness. Moissanite--also known as silicone carbide--does occur naturally but is too rare in nature to be used in jewellery. With scientific advances, however, moissanite is now being produced in the laboratory, and used widely in jewellery. It is very difficult, even for skilled jewellers, to tell the difference between diamond and moissanite with the naked eye, however there are several methods that when used together can differentiate the two stones.
- Skill level:
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Things you need
- Charles & Colvard's patented Tester Model 590
- 10x jewellers loupe
- Gemological certification
- Diamond or moissanite
Place the stone in front of the light on the Charles & Colvard's tester model. Look at the light that's emitted by the stone. Moissanite will produce a rainbow when the light is refracted and a diamond will produce white light.
Look at the stone from the top, or crown, down towards the bottom, or pavilion. A moissanite stone will have a "doubling" quality in which the facets of the moissanite will appear to be doubled. The diamond's facets, on the other hand, will appear singly.
Look at the stone under the loupe again, but this time look at the girdle of the stone. The girdle is the edge that runs around the outside of the stone under the crown. A girdle on a diamond will most of the time be unpolished, while the girdle on the moissanite will be polished.
Look for a gemological certification. A diamond should always come with a certification from either GIA or EGL laboratories, whereas a moissanite will not.
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