National Museum of Natural History

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How Do Diamonds Get Their Fancy Colors?

From brilliant blues to fiery reds, discover how nature crafts diamonds in every color, and why some shades are rarer than the rest

A slab of multicolored, sedimentary rock is pictured with vibrant trees and water surrounding it.

Meet the Scientist Venturing to Remote Canada in Search of the Earth’s Oldest Rocks

Smithsonian researcher Wriju Chowdhury is part of an expedition searching for 4-billion-year-old crystals that could uncover the secrets behind Earth’s early history

A blue bird with white and grey spots lies against a white background.

Celebrate the Holiday Season with the Museum’s Stunning Collection of Blue Specimens

Learn how this rare hue shows up in the natural world with some of the Smithsonian’s bluest specimens

Silver tweezers hold a small diamond against a white background.

Five Functions of Diamonds Beyond Rings

From saw blades to scientific instruments, this tough mineral works like a charm

Smooth pearls in the shape of orbs and ovals are usually created by bivalves, like mussels, in pearl farms. As with all gems, the less blemishes they have, the more valuable they are. (Chip Clark, Smithsonian)

The True Story Behind How Pearls Are Made

Learn about how mollusks create these shiny gems and how that biological process could change as Earth’s waters warm

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