Rock & Mineral Encyclopedia

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

Yellow Obsidian

Yellow to golden volcanic glass; natural examples owe their color to iron, though much bright yellow obsidian on the market is manufactured glass.

An earthy Australian-style jasper in red, ochre, and yellow tones evoking the colors of the Outback desert.

A translucent to transparent opal in warm yellow, orange, and red tones, prized for body color rather than play-of-color.

A transparent yellow to golden gem variety of labradorite feldspar, usually faceted to show its clear, warm color.

A calcium titanium silicate, gem-known as sphene, famous for fiery dispersion that exceeds diamond and rich green-to-yellow colors.

A bright lemon-yellow opal, usually common opal, valued for its cheerful citrus color and translucent glow.

A rare grossular-andradite blend ('grandite') from Mali, prized for its high brilliance and golden-green to yellow color.

A golden-toned opal ranging from translucent common opal to precious stones flashing color against a warm yellow body.