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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 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.

SOLD

Oxyphlogopite

#BW57389

Details
Data
Provenance
Resources

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

with Staurolite - #BW57581

Details
Data
Provenance
Resources

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: View Paragonite

SOLD

Phlogopite

#57599

Details
Data
Provenance
Resources

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

SOLD

Phlogopite

with Anthophyllite - #BW57582

Details
Data
Provenance
Resources

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.