Rock & Mineral Encyclopedia

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

Willow Creek Jasper

A prized Idaho jasper known for porcelain-smooth pastel pinks, creams, and greens in soft swirling, orbicular patterns.

A precious opal showing dominant peacock-like blue, green and teal play-of-color, often on Ethiopian material.

A sought-after elbaite tourmaline in teal hues that blend blue and green, prized for its ocean-like color.

Tourmaline crystals displaying two or more distinct colors at once, including the famous pink-and-green watermelon variety.

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

A mottled green jasper whose blotchy spotting resembles frog skin, valued by lapidaries for its earthy, camouflage-like patterns.

A green-and-black mottled jasper whose scale-like patterning resembles reptile skin, often linked to Kambaba and crocodile jaspers.

A group of silicate gemstones best known for deep red but spanning nearly every color, including green tsavorite and orange spessartine.