Allanite
Curated by Maggie Liu · Updated:
Allanite is a silicate mineral recognized among collectors for its crystal form and distribution.
About Allanite
Allanite belongs to the silicate class in the epidote group / ree-bearing epidote and has the chemical formula (CaCe)(Al2Fe2+)(Si2O7)(SiO4)O(OH). It crystallizes in the monoclinic system and holds a steady position among silicate species.
Identification & care
Crystals commonly develop as prismatic to tabular crystals; also massive, disseminated; commonly metamict (amorphous from radiation damage). Its color is typically black to brownish-black, dark brown and rarely translucent greenish-brown in fresh material. The luster is vitreous, sub-metallic, resinous; pitchy when metamict, the streak is gray to grayish-brown, and specimens are typically opaque; rarely translucent. The cleavage is imperfect {001} and {100}. The fracture is conchoidal to subconchoidal; often metamict, which aids identification.
Collector context
Collector notes
For collectors, Allanite is a benchmark crystalline species.
Frequently asked questions
What is Allanite?
Allanite crystallises in the Monoclinic system. Allanite is a silicate mineral recognized among collectors for its crystal form and distribution.
What crystal system does Allanite belong to?
Allanite crystallises in the Monoclinic crystal system.
Related minerals
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