Dims: 7.0 x 6.3 x 3.7" (17.8 x 16.0 x 9.4 cm)
Wt: 5.7 lbs. (2.6 kg)
One of the larger Smithsonite speicmens that we have had available, this cabinet piece consists of a rather dull, pale-brown host rock that is partly covered with a crust of round, heavily-intergrown Smithsonite blades. These blades are so intergrown that they create almost reniform formations, but they are large enough (up to 0.1" or 3 mm diameter) to be easily seen. They are generally in excellent condition, as the crust shows damage only in a few small, highly-exposed areas. The crystals show very good form for their intergrowth, as the rounded trigonal blades have sharp edges and smooth faces that possess a pearly-to-vitreous luster. All have a moderately pale green coloration with a hint of blue, and are translucent to dimly transparent. They are not alone, though; on top of the Smithsonite crust rest many cerussite prisms and wulfenite blades. All show excellent form after their own habits and almost no damage. The cerussite has the standard cream-color, adamantine luster, and cloudy translucence, and the wulfenite blades are a pale yellow-orange and are transparent, with a vitreous luster. Scattered widely among these crystals are many formations of a dull black material that I cannot identify. I would think that it was made up of plattnerite, given the association to the other lead minerals, but it has a positively dull luster, and crystals are difficult to discern and warped due to heavy intergrowth. I would think that it is a lead-based mineral, though, as the host rock contains a substantial amount of galena.