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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 phlogopite, roscoelite, tainiolite, and tetraferriannite and more from places like Heřmanov, Žďár nad Sázavou dist., Vysočina, Czech Republic, Srednyaya Padma mine, Zaonezhie pen., Karelia, Russia, Lovozero Massif, Kola Peninsula, Russia, Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada, Magnet Cove, Hot Spring Co., Arkansas, United States, and Silver Crater mine, Bancroft, Ontario, Canada.

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.

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

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

SOLD

Roscoelite

#46482

Details
Data
Provenance
Resources

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

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

SOLD

Tainiolite

#PD44739

Details
Data
Provenance
Resources

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

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

SOLD

Tainiolite

#57589

Details
Data
Provenance
Resources

Locality: Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
Formula: KLiMg₂Si₄O₁₀F₂
Availability: Sold
Size: 5.5 x 3 x 3 cm - Sm Cabinet

A silvery yellow plate of Tainolite to 2cm on syenite matrix.

Tainiolite is a Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahedral with lithium and Mg(II), and fluorine in the (A) position.

Occurs as pseudohexagonal tablets to 5cm, as scales, colorless to brownish green. Found in nepheline syenite pegmatites at MSH and Hot Springs, Arkansas.