This stone is a totally gemmy octohedron with PERFECT "brown Argyle" color, classic for this mine! It is as good a thumbnail diamond crystal as you can want, and is a full 1-cm-sized thumbnail specimen in terms of competition. It has a riveting adamantine luster, and weighs 4.04 cts. Now that brown diamonds are in vogue in the fashion trade, it has gotten very hard to come by good specimen crystals from this mine on the market any more. Joe Budd photos.