Rock & Mineral Encyclopedia

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

Crocoite

A striking lead chromate mineral prized for its brilliant orange-red prismatic crystals, with the finest specimens from Tasmania.

Clear quartz mined in the Himalayan region, often double-terminated and containing dark hematite or carbon inclusions.

A translucent yellow-green silicate famous for its botryoidal 'grape' clusters, often hosting needle-like sprays of black epidote.

The common iron-rich black variety of tourmaline, by far the most abundant tourmaline species and a popular grounding crystal.

The calcium-iron garnet species, ranging from brilliant green demantoid to golden topazolite and jet-black melanite.

A rare iron-rich (ferric) species of the tourmaline group, dark brown to bronze-black, named after crystallographer Martin Buerger.