Thumbnail, 1.6 x 1.3 x 1.2 cm, 19.02 ct
South Africa
An excellent, sharp diamond octahedron, weighing in at 19.02 carats. The crystal has edges of 1.0 to 1.2 cm, and is 1.6 cm tip to tip. Even when minimally backlit, there is a nice gemminess and translucency. The adamantine luster is superb, as you would hope! This is a stunning, relatively large and sharp thumbnail specimen for a diamond crystal, that does not break the bank to own one of good size. I got it years ago, and probably could not replace it today at the price.