Miniature, 5.0 x 3.5 x 2.0 cm
N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa

LEMON-yellow ettringite crystals of this size are exceedingly rare! This one is complete all around the front and sides, contacted only along its back side, and so it displays stunningly in a showcase and adds a color that is, except for sulfur and a few rare species, pretty unique in the natural mineral kingdom (well, for nonradioactives). 5 x 3.5 x 2 cm