Effects seen trough the chelsea, emerald or jadeite filter.
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| Place the stone on a white paper. Use a incandecent light source. Place the filter close to your eye. The filter can be very useful when you are confronted with many stones, particularly if you have a lot of small stones to check. The results with the chelsea, emerald and jade filter are considererd to be non determinant. Use this tool in combination with other tests. As a rule, try to confirm each result with a second test measuring an other property.
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