mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
1 item @ $125.00  

Mineralpedia Details for Gormanite

Reset

Gormanite

Gormanite

Named to honor Donald Herbert Gorman, a Professor of Mineralogy in the department of Geology at the University of Toronto in Canada. Gormaite is a rare mineral that occurs as fracture filling in phosphate-ironstone and in fractures in tonalite. Localities include in Canada, the United States, Namibia, and a few others.

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

Formula
Fe2+3Al4(PO4)4(OH)6ยท2H2
Crystal System
Triclinic 
Crystal Habit
Radial, Aggregates, Bladed 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue green 
Streak
pale green 
Class
Triclinic 
Hardness
4-5 
WebMineral
View Gormanite 
Mindat
View Gormanite 

Gormanite from Big Fish River, Dawson dist., Yukon Territory, Canada

Gormanite
            from Big Fish River, Dawson dist., Yukon Territory, Canada

Dark green splinter-like crystals to 0.75mm or up to 2mm as singles and as thick mattes.

Deep green flat-lying crysatl spray to 1.5cm.

Click thumbnail images for larger view.

Gormanite from Bisbee, Cochise Co., Arizona, United States

Gormanite
            from Bisbee, Cochise Co., Arizona, United States

Blue compact fibrous crystal bunches in matrix. Got to be rare for Bisbee. Must also be from the same material as described in Anthony et al as this is a partial drill core.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2021 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map