1. Possible read-through effect.
2. High dispersion
a. Flash of rainbow colors on table.
b. Monochromatic color flash on pavilion facets.
3. Higher SG than diamond.
4. Characteristic immersion reflection patterns.
5. Characteristic fluorescence.
6. Lacks thermal conductivity.
7. Doubly refractive.
a. Diamond is singly refractive (isometric crystal
system).
b. Simulant may show doubling of facets.
8. Lower refractive index.
a. Causes lower luster.
b. Diamond has highest luster of any gem.
9. Lower hardness.
a. Diamond hardest gem material.
b. Causes simulants to have abraded facets, scratched
surfaces. |
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