Mineralpedia Details for Jagoite

Named after John Bernard Jago Trelawney, who was an American mineral collector from California, USA and was a great benefactor of mineral collections. Jagoite is a rare mineral that occurs in hematite ore in metamorphosed iron-manganese orebodies in only one locality in the world at Langban in Sweden. Associated minerals include melanotekite and quartz.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/jagoite.pdf

Formula

(Pb,Na)₃(Fe³⁺,Mg)Si₃O₁₀(Cl,OH) 

Crystal System

Hexagonal 

Crystal Habit

Micaceous, Aggregates 

Cleavage

Perfect, None, None 

Luster

Vitreous (Glassy) 

Color

yellow green 

Streak

yellow 

Class

Hexagonal - Ditrigonal Dipyramidal 

Fracture

Flexible 

Hardness

3 

WebMineral

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Mindat

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Yellow platy micro crystals to less than 0.2mm.