Rock & Mineral Encyclopedia

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

Dalmatian Stone

A cream-colored feldspar-and-quartz rock peppered with dark spots, named for its resemblance to a Dalmatian dog.

A cream-colored spotted stone resembling a Dalmatian dog, made of feldspar and quartz dotted with dark mineral grains.

A banded chalcedony agate with bold alternating dark and light stripes resembling zebra markings, sometimes color-enhanced.

A green-hued banded chalcedony, ranging from natural soft greens to brightly dyed commercial stones.

A yellow to golden banded chalcedony colored by iron, ranging from natural honey tones to dyed commercial stones.

A white, porous borate mineral webbed with gray-black veins, widely dyed to imitate turquoise and other stones.

A red-toned banded chalcedony colored by iron oxides, ranging from natural carnelian-like reds to heat-treated stones.

A magnesium carbonate mineral, usually chalky white with grey veining, widely dyed to imitate turquoise and other stones.

A white to grayish banded chalcedony, the natural base color of much agate and the substrate for many dyed stones.