Glossary & Explanation for Gemstones
Glossary & Explanation
Explanation of how gemstones are treated
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R: The stone was treated with gamma or electron radiation and then, if necessary, with heat. |
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H: The stone was heated. |
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H*: Treatment by heating cannot be ruled out since this treatment method is usually used for this type of stone. Even a gemmological examination cannot determine whether the stone has been heated or not. Therefore, we generally assume treatment with heat. |
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N: This is a natural gemstone without any treatment for quality enhancement. |
Explanation of the quality of gemstones
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ec: This is an eye-clean gemstone. The stone shows no inclusions visible to the naked eye. |
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SI: The stone shows minor inclusions visible to the naked eye. The look of the gemstone is not significantly affected. |
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I: The stone shows clearly visible inclusions. |
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SI-I: The gemstone has light to medium inclusions which are revealed depending on the viewing angle. |
Explanation of the categorisation of colours
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AAA: dark blue |
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AA: medium blue |
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A: light blue |
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B: pastel blue |
- There may be slight colour differences within a product group.
- Different monitors can cause colour deviations. The colour settings of a monitor can distort the actual colour of the gemstone.
- There may be colour differences between products of different shapes. For example, a round aquamarine in AAA can be lighter than an oval aquamarine with the same AAA colour designation.
General explanation
- The size of the gemstones can deviate +/- 0.1 mm from the information provided.
- Specifying a weight range means that several gemstones are offered under this product category. Since no gemstone is the exact same weight as the other, a weight range is used.