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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 ferroceladonite, fluorannite, kinoshitalite, lepidolite and more from places like 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, Itinga, Minas Gerais, Brazil, and Haddam, Middlesex Co., Connecticut, United States.

SOLD

Ferroceladonite

with Albite - #57588

Details
Data
Provenance
Resources

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

Mineralpedia: View Ferroceladonite
On Dakota Matrix: Previously Sold Ferroceladonite
On Dakota Matrix: Other Available Ferroceladonite
WebMineral: View Ferroceladonite
Mindat: View Ferroceladonite

SOLD

Fluorannite

#PD57597

Details
Data
Provenance
Resources

Locality: Katugin Ta-Nb deposit, Kalarsky dist., Zabaykalsky Krai, Russia
Formula: KFe²⁺₃(Si₃Al)O₁₀F₂
Availability: Sold
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: 3

Collection: Don Phillips Collection

Mineralpedia: View Fluorannite
On Dakota Matrix: Previously Sold Fluorannite
On Dakota Matrix: Other Available Fluorannite
WebMineral: View Fluorannite
Mindat: View Fluorannite

SOLD

Kinoshitalite

#PD57595

Details
Data
Provenance
Resources

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

Mineralpedia: View Kinoshitalite
On Dakota Matrix: Previously Sold Kinoshitalite
On Dakota Matrix: Other Available Kinoshitalite
WebMineral: View Kinoshitalite
Mindat: View Kinoshitalite

SOLD

Lepidolite

with Muscovite - #43759

Details
Data
Provenance
Resources

Locality: Itinga, Minas Gerais, Brazil
Formula: K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂
Availability: Sold
Size: 9.5 x 4 x 1 cm - Cabinet

White Muscovite rimmed by purple Lepidolite.

Lepidolite is a lithium rich mica falling within the solid solution of polylithionite - trilithionite. According to Dr. David London, the lilac or purple color is not due to the presence of lithium but due to the presence of minor manganese. Lepidolite is found chiefly in pegmaties but not exclusive to pegmatites.