All rocks are made of one or more minerals. Minerals are solid, naturally occurring substances with well-defined crystal structure and chemical compositions. Rock and mineral collecting is a popular ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. NMNH - Anthropology Dept.

Malachite is known for its vibrant green colour and distinctive banded patterns. The bands are usually concentric and can range from light to dark green. Malachite forms through the weathering and ...