Details about the Concave Cut Sapphire and Diamond Ring –
- 18K White Gold
- 1.39 carat Sapphire
- Diamond Details
Concave cutting of gems is a more recent innovation. In concave cutting, the facets are three dimensional rather than flat — they have depth as well as length and width.
Concave facets have different optical properties than two dimensional facets. In general, a concave facet refracts more of the ambient light and returns it to the eye as brilliance. Concave cutting will thus increase the brilliance of a gem, while at the same time providing a diffusing effect, so that the brilliance is quite even, with no hot spots or dark regions, and diminished color zoning.*
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*Source: AJS Gems.