(1) flashing (Scintillation) is flashing diamond flash, that is, when the diamond or the light source, the observer moves relative to the surface of the white light reflection and grinding cup wheels flash. Colorless, transparent, well-crystallized poly octahedral shaped diamond surface bodies or, if not Gache grinding can expose good flashing light.
(2) Identification of the optical intensity (Brilliance) because of the diamond has a very high reflectivity of the reflection critical angle is small, a wide range of total reflection, total reflection light is easily reflected light is large, resulting in high sds plus drill bits brightness.
(3) Gloss (Luster) outstanding diamond-like hard, smooth and bright crystal face or cleavage face in white light reflection effect particularly strong, and this is very characteristic of the role of reflective called adamantine luster.
(4) the dispersion or the fire (Dispersion or fire) planes of diamond as diverse as prism, can through refraction, reflection and total reflection into the interior of the crystal composition fibre discs of white light into white color - red, orange, yellow, green, blue, indigo, violet shade.
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