Trolleite CRYSTAL

Trolleite Crystal

Trolleite is a rare aluminum phosphate mineral (Al4(PO4)3(OH)3) with a distinctive dusty blue to blue-green color. It was named after Swedish chemist Hans Gabriel Trolle-Wachtmeister, who first identified the mineral in the 19th century. Trolleite has a Mohs hardness of 8, making it one of the harder collector minerals — tougher than most stones in a typical crystal collection.

Most commercial trolleite specimens come from Minas Gerais, Brazil, where the mineral occurs embedded in quartz matrix. The original type locality is Västanå, Sweden. Trolleite's rarity and unusual blue color have made it increasingly popular among collectors, though it remains relatively unknown outside serious mineral circles. The blue color ranges from pale powder blue to deeper slate, often with white quartz or lazulite associations.

This collection features raw specimens, polished pieces, and palm stones. Trolleite's blue tones pair well with lapis lazuli, kyanite, and blue calcite. For other rare minerals, browse our Collector's Edition. Free shipping on all U.S. orders over $150.

Frequently Asked Questions

What is trolleite?

Trolleite is a rare aluminum phosphate mineral (Al4(PO4)3(OH)3, Mohs 8) with a distinctive dusty blue color. Named after Swedish chemist Trolle-Wachtmeister. Most commercial specimens come from Brazil, with the type locality in Sweden.

Is trolleite rare?

Yes. Trolleite is genuinely uncommon in the mineral world. It occurs in relatively few localities, and gem-quality or display-quality specimens are limited. Brazilian trolleite-in-quartz is the most commercially available form, but even this is not abundant compared to common minerals.

How hard is trolleite?

Trolleite has a Mohs hardness of 8 — harder than quartz (7) and on par with topaz. This makes it exceptionally durable for a collector mineral. However, specimens embedded in quartz matrix may have varying hardness depending on which mineral makes up the surface you are handling.

What color is trolleite?

Trolleite ranges from pale powder blue to deeper slate blue, sometimes with blue-green tones. It often occurs with white quartz and sometimes with lazulite (a darker blue phosphate). The color is subtle and matte rather than vivid — a dusty, chalky blue that is distinctive once you learn to recognize it.

How do I care for trolleite?

Trolleite's Mohs 8 hardness makes it quite durable. Clean with a soft damp cloth. Store normally — it will not scratch easily. The main care consideration is for raw specimens with matrix: handle them by the base rather than by thin crystal edges.