SULFUR
Specimen sul-15
$ 140.00Dims: 6.9" x 6.3" x 4.0" (17.5 x 16.0 x 10.2 cm)
Wt: 8.1 lbs. (3.7 kg)
Agrigento, Sicily
This cabinet specimen consists of dozens of small but well-formed orthorhombic prismatic native Sulfur crystals that rest on a base rock that is made up of intergrown Sulfur and white calcite. The largest of these crystals does not exceed 0.5" (1.3 cm) in any dimension; though there are many crystals that are damaged, incomplete, or missing, many others are intact and show excellent form, with well-defined edges and smooth faces whose lusters range from pearly to vitreous. All have the bright yellow coloration that is standard for Sulfur, and almost all of the crystals are transparent and show excellent clarity; some of the larger crystals, however, do show slight but noticeable internal fracturing. They rest on a crust of dirty white calcite crystals that are extremely intergrown. This crust appears to cover a formation of much larger calcite or aragonite crystals that have a hexagonal prismatic form and are capped by flat, basal terminations. There is also another crust of Sulfur crystals resting under part of this calcite druse, and more massive Sulfur serves as a base rock beneath that.