Other Blog. Solitaire Solitaire is the ring with single diamond in the setting and represents symbol of “single love". It is popular for use in engagement. Emerald Emerald is crystal mineral in Beryl family, consisting of Chromium (Cr) and resulting in white. Premium emerald must be transparent with even color over the grain. Weight and Diameter of Round Brilliant Diamond The weight and diameter of diamond are related and regarded as significant factors of diamond selection consideration.