Extracted from mines all over the world, the minerals in this exhibition include dense quartz clusters from Arkansas, deep purple amethyst from Brazil, a massive 175-pound Peruvian pyrite, and exquisite okenite and stillbite specimens from India.

Featuring more than thirty specimens collectively weighing nearly two tons, Massive features a wide variety of minerals and crystal forms. Gypsum, a widespread and economically important calcium sulfate hydrate, is represented in the exhibition by several samples from Mexico, including a dramatic cluster of sandy-colored, bladed desert rose selenite crystals, a 101-pound “fishtail” selenite cluster of translucent twinned crystals, and a single, well-developed individual 37-inch long crystal. In contrast to these crystals, Massive features several specimens with smooth, globular habits, such as azurite and smithsonite from New Mexico, and deep-green malachite from the Democratic Republic of Congo.