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Micaceous Minerals

Saturday, 26 February 2022 08:00 AM

Introducing the "Micaceous Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including clintonite, ferroaluminoceladonite, ferroceladonite, fluorannite, kinoshitalite, and lepidolite and more from places like Crestmore, Riverside Co., California, United States, Taikeu, Polar Urals, Russia, Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada, Katugin Ta-­Nb deposit, Kalarsky dist., Zabaykalsky Krai, Russia, Hokkejino, Kizugawa City, Kyoto, Kinki Region, Honshu Island, Japan, and Haddam, Middlesex Co., Connecticut, United States.

Clintonite

with Diopside - #57585
Locality
Crestmore, Riverside Co., California, United States 
Formula
CaAlMg2(SiAl3)O10(OH)2 
Availability
Sold
Size
7 x 4.5 x 3 cm - Sm Cabinet 

Emerald green micaceous plates to 1.5cm.

Clintonite is a phyllosilicate - Monoclinic - Mica group member. It is a brittle Mica - Trioctahedral. Ca, Na, K occupies the Interlayer (I) positions while Mg, Fe2+, Al, Fe3+, Mn in the octahedral positions.

It occurs as tabular, pseudohexagonal, foliated crystals in association with calcite, idocrase, grossular, spinel, phlogopite in crystalline limestones i.e. Crestmore (Encycl. of Min.).


Clintonite

Formula
CaAlMg2(SiAl3)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Radial 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
colorless, green, yellow, red, reddish brown 
Streak
colorless 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
4-5 
SOLD
Ferroaluminoceladonite - 46455
Ferroaluminoceladonite - 46455

Ferroaluminoceladonite

#46455
Locality
Taikeu, Polar Urals, Russia 
Formula
KFe2+AlSi4O10(OH)2 
Availability
Sold
Size
0.8 x 0.5 x 0.3 cm - Thumbnail 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

Tiny, less than 0.25mm, micaceous scales identified by Dr. Igor Pekov.


Ferroaluminoceladonite

Formula
KFe2+AlSi4O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Microscopic Crystals 
Cleavage
Perfect, None, None 
Luster
Earthy (Dull) 
Color
dark bluish green 
Streak
paler green 
Class
Monoclinic - Prismatic 
Fracture
Earthy 
Hardness
2-2.5 
Special Info
XRD Confirmed
Special Info
EDS Confirmed

Ferroceladonite

with Albite - #57588
Locality
Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada 
Formula
KFe2+Fe3+Si4O10(OH)2 
Availability
Sold
Size
5.5 x 4.5 x 3 cm - Sm Cabinet 

Very fine-grained green scaley crystals throughout mass with Albite.

Ferroceladonite is phyllosilicate and mica group member. It is an Ordinary (True or Common) Mica - Dioctahderal. The iron(II) analog of Celadonite. Only a handful of localities worldwide. According to Bernard and Hrysl, occurs as submicrometric grains, pale green to bluish green in vesicles with chlorite. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.


Ferroceladonite

Formula
KFe2+Fe3+Si4O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Microscopic Crystals 
Cleavage
Perfect, None, None 
Luster
Earthy (Dull) 
Color
dark bluish green 
Streak
paler green 
Class
Monoclinic - Prismatic 
Fracture
Earthy 
Hardness
2-2.5 

Fluorannite

#PD57597
Locality
Katugin Ta-­Nb deposit, Kalarsky dist., Zabaykalsky Krai, Russia 
Formula
KFe2+3(Si3Al)O10F2 
Availability
Available
Price
$45.00
Size
2 x 2 x 1 cm - Thumbnail 

Black micaceous crystals to 1mm. Rare.

Fluorannite is the fluorine analogue of Annite. It is basically compact black and micaceous. It is actualy quite rare having been found in only three worldwide localities thus far.


Fluorannite

Formula
KFe2+3(Si3Al)O10F2 
Crystal System
Monoclinic 
Crystal Habit
Foliated, Fibrous, Tabular 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
iron black 
Streak
gray 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
Collection
Don Phillips Collection

Kinoshitalite

#PD57595
Locality
Hokkejino, Kizugawa City, Kyoto, Kinki Region, Honshu Island, Japan 
Formula
BaMg3(Si2Al2)O10(OH)2 
Availability
Sold
Size
4 x 3 x 2.5 cm - Miniature 

Tiny, less than 0.5mm, scales in Quartz rich matrix.

Kinoshitalite is a phyllosilicate and monoclinic and a mica group member. It is a brittle mica and trioctahedral. Barium occupies the Interlayer (I) cation positions with Mg at the (M) sites.  May contain Mn and Ti. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

It typically occurs as scales to 1mm, yellow-brown, in Mn-rich marbles and skarns and in metamorphc granulite facies of Mn ore  deposits (Bernard & Hrysl). It is associated with haussmanite, tephroite ore in Japan. Only 2 US localities  and Langban per Mindat.

This specimen shows tiny yellowish platelets.


Kinoshitalite

Formula
BaMg3(Si2Al2)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Scaly 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellow brown, colorless 
Streak
yellow white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
2.5-3 

Lepidolite

rim on Muscovite - #48447
Locality
Haddam, Middlesex Co., Connecticut, United States 
Formula
K(Li,Al)3(Si,Al)4O10(F,OH)2 
Availability
Sold
Size
7 x 4 x 4.5 cm - Sm Cabinet 

Light purple Lepidolite rimming Muscovite on Quartz.


Lepidolite

Formula
K(Li,Al)3(Si,Al)4O10(F,OH)2 
Crystal System
Monoclinic 
Crystal Habit
Platy, Foliated, Massive 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, gray white, lilac, yellowish, white 
Streak
white 
Class
Monoclinic 
Fracture
Uneven 
Hardness
2.5-3 
Collection
Dr. David London Collection

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