Rock & Mineral Encyclopedia

Search and identify 1,000+ rocks, minerals, crystals, and gemstones — with properties, formation, colors, hardness, and how to tell them apart.

Bumblebee Jasper

A vivid yellow-and-black banded stone from Indonesian volcanic vents, colored by sulfur, arsenic minerals and iron oxides, not true jasper.

A banded variety of chalcedony quartz, famed for its colorful concentric layers and enormous range of patterns and colors.

A soft sky-blue banded chalcedony prized for its delicate, lace-like white and blue swirling patterns.

A swirling, intricately banded lace agate from Eswatini (Swaziland) in soft greys, blues and lavenders with delicate folded patterns.

A vividly swirling banded agate from northern Mexico with intricate looping patterns in warm reds, golds and creams.

A translucent, soft blue variety of microcrystalline quartz whose color comes from light scattering through its fine structure.

A banded chalcedony combining reddish-brown sard with white or black onyx layers, prized since antiquity for carved cameos.

A warm orange-to-red variety of chalcedony quartz colored by iron oxide, used since antiquity for seals, beads, and cabochons.

A banded variety of chalcedony quartz, classically black or black-and-white, long favored for cameos and beads.