Rock & Mineral Encyclopedia

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

Dragon Blood Jasper

A green-and-red ornamental stone of epidote and red piemontite or iron oxide, named for its dragon-skin coloring; not a true jasper.

The blue-green gem variety of microcline feldspar, often mottled with white, prized as an affordable ornamental stone.

A prized Mexican jasper known for pastel green, lavender, and cream orbicular patterns that take an exceptional polish.

A prized Idaho picture jasper from Bruneau Canyon known for brown and cream orbicular egg-rock patterns and scenic landscapes.

A transparent to milky opal that displays a soft bluish-white internal glow or sheen that seems to follow the light source.

An opaque to translucent milky-white common opal valued for its soft porcelain-like color rather than play-of-color.

Clear quartz crystals marked by distinctive horizontal ladder-like striations, popularized from Brazil as a metaphysical stone.

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

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

A green ornamental stone, often serpentine-rich marble or verde antique, valued for its rich green color and white veining.

A pink, manganese-rich variety of zoisite used as an ornamental gemstone, often mottled with white quartz and grey matrix.