Denver Museum of Nature and Science

A rough, irregularly shaped gold nugget with intricate textures and a lustrous, metallic surface, displayed against a dark background.

"Tom's Baby" gold nugget on display at Denver Museum of Nature and Science

A carved opal bust of a man wearing a top hat, displayed on a black stand. The opal exhibits a subtle play of colors, giving it a luminous quality.

Tiny opal sculpture on display at Denver Museum of Nature and Science

A cluster of white, crystalline formations with sharp, radiating spines stands against a dark background.

Mesolite crystal on display at Denver Museum of Nature and Science

A circular cross-section displays concentric bands of white, gray, and tan crystalline material.

Slice through a quartz nodule on display at Denver Museum of Nature and Science