Colorado

A crescent moon against a dark night sky.

Crescent moon over Dillon

A crescent moon against a dark night sky.

Crescent moon over Dillon

Crescent moon against a dark night sky.

Crescent moon over Dillon

Quaking aspens in autumn at Marina Park

Quaking aspens in autumn with crescent moon on Tenderfoot Mountain

A cluster of tall aspen trees against a blue sky, their white trunks and yellow leaves prominent.

Quaking aspens in autumn on Tenderfoot Mountain

An illuminated half-moon against a black background.

Waning moon over Dillon

A half-moon is visible against a black background.

Waning moon over Dillon

A portion of the moon's surface, showing several craters and a prominent crater near the right edge.

Waning moon over Dillon

A small house made of light brown bricks, featuring a covered porch with white columns and surrounded by well-manicured landscaping.

Russell-Graves House

A bright, white moon is shown against a black background, with visible craters on its surface.

Waning moon over Arvada

An almost full moon is shown at night against a black sky.

Waning moon over Arvada

An almost full moon is seen against a black background.

Waning moon over Arvada

Waning moon over Arvada

Full moon over Arvada

A full moon shining brightly against a dark night sky.

Waxing moon over Arvada

A full moon shining brightly against a dark night sky.

Waxing moon over Arvada

Waxing moon over Arvada

An almost full moon is visible against a black background.

Waxing moon over Arvada

Waxing moon over Arvada

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

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