A selection from the renowned Duval Collection of gems and minerals at the Houston Museum of Natural Science, this superb collection consists of numerous breathtaking pieces from around the world, all chosen for their beauty, form, and color. Highlights of the collection include one of the world's largest gem quality turquoise nuggets and a magnificent cluster of transparent quartz crystals that weigh nearly 2000 pounds.

Exhibition organized by the Houston Museum of Natural Science through a gift from Pennzoil-Quaker State Company with the support of Shell Oil Products U.S.