This is a unique specimen in my experience since good scoro thumbs usually consist of broken single crystals and here we have a veritable hedgerow of bright blue crystals on matrix arranged in an attractive sweeping pattern. In person, the color is much darker than it appears here, and has a sparkling color-shifting quality to it that is difficult to capture on camera. It is a very impressive thumbnail that stands out because of its color and innate sparkliness even in mediocre light! Ralph described this piece on the accompanying label card as an "absolutely unique 22 mm hemisphere of lustrous rich blue crystals to 6 mm on matrix." 2.4 x 2 x 2 cm