Aragonite is a carbonate mineral, one of the two common, naturally occurring, crystal forms of calcium carbonate. It's commonly found crystallized in the form of small prismatic crystals, masses, stalactites, and spherical radiating aggregates. It is formed by biological and physical processes, including precipitation from marine and freshwater environments.

Pyrite is a brass-yellow mineral with a bright metallic luster. It has a chemical composition of iron sulfide and is the most common sulfide mineral. It forms at high and low temperatures and occurs, usually in small quantities, in igneous, metamorphic, and sedimentary rocks worldwide. Pyrite has a nickname that has become famous - "Fool's Gold." The mineral's gold color, metallic luster, and high specific gravity often cause it to be mistaken for gold by inexperienced prospectors.

Goethite is an iron oxyhydroxide containing ferric iron. It is the main component of rust and bog iron ore. Goethite's hardness ranges from 5.0 to 5.5 on the Mohs Scale, and its specific gravity varies from 3.3 to 4.3. The mineral forms prismatic needle-like crystals ("needle ironstone") but is more typically massive.

All crystals and minerals vary slightly in size and shape. You will receive a high quality specimen of the selected item but not the exact one pictured.

All minerals and crystals vary slightly in size and shape. You will receive a high quality specimen of the selected item but not the exact one pictured. All minerals, gems, stones and fossils are guaranteed to be top quality; sourced from ethical vendors around the world.