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0 item @ $0.00  

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 oxyphlogopite, paragonite, roscoelite, and tainiolite and more from places like Rothenberg, Bell, Eifel, Rhineland-Palatinate, Germany, Route 103 road cuts, Chester, Windsor Co., Vermont, United States, Palabora mine, Phalaborwa, Limpopo, South Africa, Heřmanov, Žďár nad Sázavou dist., Vysočina, Czech Republic, Srednyaya Padma mine, Zaonezhie pen., Karelia, Russia, and Lovozero Massif, Kola Peninsula, Russia.

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

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

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

Phlogopite

with Anthophyllite - #BW57582
Locality
Heřmanov, Žďár nad Sázavou dist., Vysočina, Czech Republic 
Formula
KMg3(Si3Al)O10(OH)2 
Availability
Sold
Size
5 x 4.5 x 3 cm - Miniature 
Special Info
Type Locality 

An interesting round nodule which at the center is a ellipsoidal mass of golden brown Phlogopite encased in tannish bladed and columnar Anthophyllite.

Phlogopite is the Mg end member of Biotite-Phlogopite series. It is a Phyllosilicate - Monoclinic - Mica group member. Phologpite 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.

Occurs sometimes as primary mineral in igneous rocks, mainly ultrabasic, in Leucite-pyroxene rock called "Wyomingite", serpentenized dunnites, altered kimberlites, alkaline ultrabasic rocks in Kola, Russia.


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
Bill Wilson Collection
Special Info
Type Locality

Roscoelite

#46482
Locality
Srednyaya Padma mine, Zaonezhie pen., Karelia, Russia 
Formula
KV3+2(Si3Al)O10(OH)2 
Availability
Sold
Size
2.5 x 1 x 1 cm - Thumbnail 
Tagged
vanadium  
Special Info
XRD Confirmed 

Tiny black scales of Roscoelite, a vanadium bearing mica. Identified by Dr. Igor Pekov.


Roscoelite

Formula
KV3+2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Micaceous, Scaly, Massive 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
brown green, greenish brown, yellow green, dark brown, dark green 
Streak
greenish white 
Class
Monoclinic - Prismatic 
Hardness
2.5 
Special Info
XRD Confirmed
SOLD
Tainiolite - PD44739
Tainiolite - PD44739

Tainiolite

#PD44739
Locality
Lovozero Massif, Kola Peninsula, Russia 
Formula
KLiMg2Si4O10F2 
Availability
Sold
Size
3.2 x 2 x 2.5 cm - Miniature 

A 1.5cm micaceous crystal of yellowish brown Tainiolite.


Tainiolite

Formula
KLiMg2Si4O10F2 
Crystal System
Monoclinic 
Crystal Habit
Micaceous, Foliated 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
brownish, colorless, greenish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Flexible 
Hardness
2.5-3 
Collection
Don Phillips Collection

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