Aragonite Crystal

Aragonite Crystal — Star Clusters & Sputnik Formations from Morocco

Aragonite is a calcium carbonate mineral (CaCO₃) that shares its chemistry with calcite but crystallizes in an entirely different structure — orthorhombic rather than trigonal — producing forms that calcite simply cannot make. The most iconic of these is the radiating "sputnik" star cluster, formed by cyclic twinning: six individual crystals intergrown around a central axis, mimicking hexagonal symmetry that aragonite's crystal system doesn't actually possess. These come primarily from the Sefrou and Tazouta regions of Morocco, where iron inclusions give the clusters their warm reddish-brown color.

Aragonite is also one of the most biologically important minerals on earth — mollusk shells, coral skeletons, and the nacre (mother-of-pearl) lining of pearl oysters are all built from aragonite. Over geological time, the mineral slowly converts to its more stable polymorph, calcite, which makes well-crystallized mineral specimens genuinely rare and prized by collectors. The mineral was formally named in 1797 after Molina de Aragón in Guadalajara, Spain, where classic twinned crystals were first scientifically described.

In crystal traditions, aragonite is associated with grounding, patience, and centering — qualities people often connect to its structured, radiating geometry. These are metaphysical beliefs, not scientific claims. Every specimen here is hand-selected and individually photographed. Browse related Moroccan minerals in our Morocco collection, or explore all crystal clusters. Wearable options live in crystal bracelets. Take the crystal quiz if you'd like a personalized suggestion. Free US shipping on orders over $150.

Frequently Asked Questions

What is aragonite?

Aragonite is a calcium carbonate mineral (CaCO₃) — the same chemical formula as calcite, but with a different crystal structure (orthorhombic vs. trigonal). This structural difference gives aragonite its characteristic radiating, needle-like, and twinned crystal forms that calcite cannot produce. It forms in low-temperature environments: hot spring deposits, oxidized ore zones, and sedimentary settings, and is also built biogenically by shellfish, coral, and pearl oysters. The mineral was named in 1797 after Molina de Aragón, Spain.

Where is aragonite found?

The best star cluster specimens come from the Sefrou and Tazouta regions of Morocco. The mineral's type locality — where it was first formally described — is Molina de Aragón in Guadalajara, Spain. Notable specimens also come from Sicily, Austria, and New Mexico. Biogenic aragonite is found worldwide in seashells, coral reefs, and pearls.

What are aragonite's traditional metaphysical properties?

In crystal traditions, aragonite is broadly associated with grounding, patience, and emotional centering. Its radiating star shape is seen as a symbol of energy moving outward from a stable center — a quality practitioners often work with during times of stress or scattered attention. These are metaphysical beliefs held in various cultural traditions, not scientific or medical claims. Read more in our crystal guide.

How do I cleanse and care for aragonite?

Aragonite is soft (Mohs 3.5–4) and reacts with acids — never clean it with vinegar or harsh chemicals, and keep it away from prolonged water exposure (it is a carbonate and will slowly etch). Dust with a soft dry brush. Store separately from harder minerals that could scratch the surface. Keep away from direct sunlight for extended periods. For energetic cleansing, moonlight or sound are the safest methods that require no water.