Although almost all the crystals on this specimen show some form of damage, their size makes them stand out! They attain maximum dimensions of 1/2 x 1/4(1.3 x 0.6 cm). They are all a dark blue color, though some areas show a very green tinge. The external damage along with many internal fractures give the otherwise black-looking crystals blue and green highlights from reflected light. There are at least 10 of these crystals on a rather dense host rock that looks like basalt. The specimen is affixed to a square acrylic base with a removable putty.