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Translations : Diaspore, Diáspora, Diaspoor, Diasporo, Діаспор, ダイアスポア, 硬水鋁石, Диаспор
Synonym : Tanatarite, Zultanite, Diasporite, Empholite, Tanatar, Tanatarite, Kayserite, Diasporogelite
Etymology : From Greek " DIASPORE " διασπείρειυ = dispersal, because of its fragmentation in the heating.
Discovery: 1801 by Rene Just Haüy
Type localityMramorskii Zavod (Mramorsk Zavod), Kosoi Brod Village, Ekaterinburg (Sverdlovsk), Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia

Utilisé en minerai d’aluminium. Sa composition est intermédiaire entre la bauxite (autre minerai d’aluminium) et le corindon (famille des saphirs et rubis).

Le diaspore montre souvent un changement de couleur suivant la source lumineuse.

Zultanite (derived of Sultanite) is often given to the variety of Diaspore resulting from Turkey.

To know more about Diaspore, see Mindat.org->

Gemological data

Chemical formula : Al O (OH)
Hardness (Mohs) : 6.5 - 7
Density : 3.3 - 3.5
Refractive index : nα = 1.682 - 1.706 nβ = 1.705 - 1.725 nγ = 1.730 - 1.752
Birefingence : 0,048
Crystal system : Orthorhombic
Group : Diaspore
Mineralogical Class : Hydroxides

The gallery

: Disapore

: Diaspore