Dims: 10.5" x 7.0" x 3.8" (26.7 x 17.8 x 9.7 cm)
Wt: 9.2 lbs. (4.1 kg)
Minas Gerais, Brazil
One of the larger Citrine specimens that we have available, this specimen consists of a portion of a geode whose insides were once covered with a druse of large amethyst crystals. We believe that this particular geode was then exposed to volcanic heat while still encased in the rock, wherein it was turned an appealing yellow-gold coloration. Many such specimens, however, are harvested as amethyst and then heat-treated, allowing the included destabilized iron atoms to stabilize, turning more of a rusty-brown color. Because the druse lines a convex surface, the crystals are well-protected and show no damage besides that of some crystals on the druse's edges. All occur in the hexagonal prismatic form, and prism faces are actually visible, as some of the crystals formed parallel to the surface. All have a vitreous luster and transparence at their terminations, which clouds towards their bases. The tip of each termination is very clear, but shows internal fractures less than 0.3" (8 mm) below the tip, which gain in concentration towards the base. A few badly-formed but still definable calcite crystals have grown on the Citrines, and are white and translucent, with a dull luster. The specimen stands upright, and some round felt pads have been put on the outer surface of it to help prevent scratching. It is a very impressive specimen- we have some difficulty in finding larger pieces like these for reasonable prices.