Rare asteriated trapiche-like diamond

Rare asteriated trapiche-like diamond

The photomicrograph below shows a rare near-colorless asteriated trapiche-like diamond (0.07 ct, type IaA>>B, Hydrogen- and Nitrogen-rich) that possess some dark grey growth sectors forming an unusual Maltese cross-like pattern. This pattern is the result of the...
Cuboid diamond with a square heart

Cuboid diamond with a square heart

The photomicrograph below shows a yellow cuboid diamond crystal (0.13 ct – type IaA>Ib>>B) with an unusual internal structure that possesses three whitish cuboid concentric layers as well as a strong inhomogeneous yellow color repartition, rarely...

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