GemNotes

NEW DIAMOND SIMULANT TO DEBUT A new diamond simulant that is harder to detect than current simulants will debut in early 1997. The material -- synthetic moissanite -- is thermally conductive like diamond, rendering conventional testers obsolete for this characteristic. In addition, the material is visually similar to diamond because of its transparency and relative colorlessness. JCK editors, who were allowed to examine a parcel, noted a very slight yellowish tinge, though producers are still working to make the stones colorless. The following table shows how closely synthetic moissanite's optical and physical characteristics mimic those of diamond and cubic zirconia. Moh's Refractive index Specific gravity Diamond 10 2.42 3.5
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