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
0 item @ $0.00  

Tobelite

#PD34812
SOLD
Tobelite from Ohgidani deposit, Tobe, Shikoku Island, Japan - PD34812
Tobelite from Ohgidani deposit, Tobe, Shikoku Island, Japan - PD34812

Tobelite

#PD34812
Availability
Sold
Size
Chip < 1cm 
Formula
(NH4)Al2(Si3Al)O10(OH)2 (RRUFF)
Locality
Ohgidani deposit, Tobe, Shikoku Island, Japan

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Dioctahderal with Al3+,, OH at the (A) and dominant NH4>K at the interlayer position.

In Bernard & Hrysl "Minerals and Their Localities" describe this mineral as white to yellow to green clayed aggregates composed of tiny flakes. Mindat list five worlwide localties, one in the USA as Five MIle Pass, Utah. Maybe our friend Joe Marty will collect some fo this stuff for us.

More on rare mica minerals

Tobelite

Formula
(NH4)Al2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Fibrous, Scaly 
Cleavage
Perfect, None, None 
Luster
Vitreous - Silky 
Color
yellowish green, pearly white 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness

Data courtesy of Webmineral.

Collection
Phillips Collection
Mineralpedia
View Tobelite
On Dakota Matrix
Previously Sold Tobelite
On Dakota Matrix
Other Available Tobelite
WebMineral
View Tobelite
Mindat
View Tobelite

Other Sold

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2025 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map