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Recently Released Special Editions

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 muscovite, oxyphlogopite, paragonite and more from places like Willis Mtn., Farmville dist., Buckingham Co., Virginia, Unites States, Saint-Marcel, Aosta Valley, Italy, Placer Dome mine, Ontario, Canada, Rothenberg, Bell, Eifel, Rhineland-Palatinate, Germany, Route 103 road cuts, Chester, Windsor Co., Vermont, United States, and Palabora mine, Phalaborwa, Limpopo, South Africa.

SOLD
Muscovite - BW57593
Muscovite - BW57593

Muscovite

var. fuchsite - #BW57593
Locality
Willis Mtn., Farmville dist., Buckingham Co., Virginia, Unites States 
Formula
KAl2(Si3Al)O10(OH)2 
Availability
Sold
Size
5 x 3.5 x 1.2 cm - Miniature 

Green micaceous chromium bearing Muscovite variety fuchsite.


Muscovite

Formula
KAl2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Foliated, Micaceous 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
white, gray, silver white, brownish white, greenish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Sectile 
Hardness
2-2.5 
Collection
Bill Wilson Collection
Mineralpedia
View Muscovite
On Dakota Matrix
Previously Sold Muscovite
On Dakota Matrix
Other Available Muscovite
WebMineral
View Muscovite
Mindat
View Muscovite
SOLD
Muscovite - PD57596
Muscovite - PD57596

Muscovite

var. alurgite - #PD57596
Locality
Saint-Marcel, Aosta Valley, Italy 
Formula
KAl2(Si3Al)O10(OH)2 
Availability
Sold
Size
5 x 3 x 2 cm - Miniature 

Pinkish purple flakes throught mass.

Alurgite is a variety of Muscovite with manganese impurity giving it the beautiful red color.


Muscovite

Formula
KAl2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Foliated, Micaceous 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
white, gray, silver white, brownish white, greenish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Sectile 
Hardness
2-2.5 
Collection
Don Phillips Collection
Mineralpedia
View Muscovite
On Dakota Matrix
Previously Sold Muscovite
On Dakota Matrix
Other Available Muscovite
WebMineral
View Muscovite
Mindat
View Muscovite
SOLD
Muscovite - 55484
Muscovite - 55484

Muscovite

var. fuchsite - #55484
Locality
Placer Dome mine, Ontario, Canada 
Formula
KAl2(Si3Al)O10(OH)2 
Availability
Sold
Size
7 x 5 x 2 cm - Sm Cabinet 

Green layers of fuchsite in schist matrix. This variety of Muscovite contains chromium which replaces the aluminum in the crystal structure. Chromium imparts the green color in fuchsite, but is not the cause of green in other phyllosilicates such as Chamosite or Clinochlore.


Muscovite

Formula
KAl2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Foliated, Micaceous 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
white, gray, silver white, brownish white, greenish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Sectile 
Hardness
2-2.5 
Mineralpedia
View Muscovite
On Dakota Matrix
Previously Sold Muscovite
On Dakota Matrix
Other Available Muscovite
WebMineral
View Muscovite
Mindat
View Muscovite
SOLD
Oxyphlogopite - BW57389
Oxyphlogopite - BW57389

Oxyphlogopite

#BW57389
Locality
Rothenberg, Bell, Eifel, Rhineland-Palatinate, Germany 
Formula
K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2 
Availability
Sold
Size
1.2 x 1 x 0.4 cm - Thumbnail 
Special Info
Type Locality 

Golden brown Oxyphlogopite crystals from 1mm.


Oxyphlogopite

Collection
Bill Wilson Collection
Special Info
Type Locality
Mineralpedia
View Oxyphlogopite
On Dakota Matrix
Previously Sold Oxyphlogopite
On Dakota Matrix
Other Available Oxyphlogopite
WebMineral
View Oxyphlogopite
Mindat
View Oxyphlogopite
SOLD
Paragonite - BW57581
Paragonite - BW57581

Paragonite

with Staurolite - #BW57581
Locality
Route 103 road cuts, Chester, Windsor Co., Vermont, United States 
Formula
NaAl2(Si3Al)O10(OH)2 
Availability
Sold
Size
6 x 5 x 2.5 cm - Sm Cabinet 

Silvery fine-grained mass of Paragonite with garnet and Staurolite. Paragonite is found in low to medium grade metamorphic environments.


Paragonite

Formula
NaAl2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Scaly, Massive - Fibrous 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
white, yellow 
Streak
white 
Class
Monoclinic 
Hardness
2.5 
Collection
Bill Wilson Collection
Mineralpedia
View Paragonite
On Dakota Matrix
Previously Sold Paragonite
On Dakota Matrix
Other Available Paragonite
WebMineral
View Paragonite
Mindat
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SOLD
Phlogopite - 57599
Phlogopite - 57599

Phlogopite

#57599
Locality
Palabora mine, Phalaborwa, Limpopo, South Africa 
Formula
KMg3(Si3Al)O10(OH)2 
Availability
Sold
Size
13 x 10 x 0.5 cm - Cabinet 

Golden to golden brown micaceous Phlogopite. 

Phlogopite is the Manganese end member of Biotite-Phlogopite series. It is a Phyllosilicate - Monoclinic - Mica group member. Phlogopite is classified as an ordinary (True or Common) Mica - Trioctahderal with Mg at the (M) positions, K as (I), and OH as (A). Mg end member of Biotite-Phlogopite series.


Phlogopite

Formula
KMg3(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Micaceous, Scaly, Lamellar 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
brown, gray, green, yellow, reddish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2-2.5 
Collection
Chris van Laer Collection
Mineralpedia
View Phlogopite
On Dakota Matrix
Previously Sold Phlogopite
On Dakota Matrix
Other Available Phlogopite
WebMineral
View Phlogopite
Mindat
View Phlogopite

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