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Pegmatite Minerals Textures & Habits

Tuesday, 27 September 2016 10:30 AM

Introducing the "Pegmatite Minerals Textures & Habits" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including albite, and beryl and more from places like Little Three mine, San Diego Co., California, United States, Harding mine, Taos Co., New Mexico, United States, Morro Velho mine, Nova Lima, Minas Gerais, Brazil, Cruzeiro mine, São José da Safira, Doce valley, Minas Gerais, Brazil, and Beauregard mine, Alstead, Cheshire Co., New Hampshire, United States.

SOLD

Albite

var. Cleavelandite - #PD33148

Details
Data
Provenance
Resources

Locality: Little Three mine, San Diego Co., California, United States
Formula: NaAlSi₃O₈
Availability: Sold
Size: 5.5 x 3.5 x 2.5 cm - Sm Cabinet
Tagged: pegmatite mineral

Colorless, bladed Albite crystals variety cleavelandite.

Albite

Formula: NaAlSi₃O₈
Crystal System: Triclinic
Crystal Habit: Blocky, Striated, Granular
Cleavage: Perfect, Good, None
Luster: Vitreous (Glassy)
Color: white, gray, greenish gray, bluish green, gray
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Uneven
Hardness: 7

Collection: Phillips Collection

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

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Albite

var. cleavelandite with Muscovite - #DH42035

Details
Data
Provenance
Resources

Locality: Harding mine, Taos Co., New Mexico, United States
Formula: NaAlSi₃O₈
Availability: Sold
Size: 15 x 10 x 7 cm - Cabinet
Tagged: pegmatite mineral

Large specimen composed of mostly white platy Albite with rose colored Muscovite. The habit of this specimen is coarse and platy, which is typical of the variety called "cleavelandite" and is usually found in the wall zone of a fractionated pegmatite.

Albite

Formula: NaAlSi₃O₈
Crystal System: Triclinic
Crystal Habit: Blocky, Striated, Granular
Cleavage: Perfect, Good, None
Luster: Vitreous (Glassy)
Color: white, gray, greenish gray, bluish green, gray
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Uneven
Hardness: 7

Collection: Hess Collection

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

SOLD

Albite

var. cleavelandite - #45371

Details
Data
Provenance
Resources

Locality: Morro Velho mine, Nova Lima, Minas Gerais, Brazil
Formula: NaAlSi₃O₈
Availability: Sold
Size: 9 x 4.5 x 3 cm - Sm Cabinet
Tagged: pegmatite mineral

Colorless crystals of cleavelandite, a variety of Albite. These are nice crystals that reach over 1cm. Most Albite seen in pegmatites is platy and massive. This specimen is an exception and is very well crystallized.

Albite

Formula: NaAlSi₃O₈
Crystal System: Triclinic
Crystal Habit: Blocky, Striated, Granular
Cleavage: Perfect, Good, None
Luster: Vitreous (Glassy)
Color: white, gray, greenish gray, bluish green, gray
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Uneven
Hardness: 7

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

SOLD

Albite

var. cleavelandite with Muscovite - #45378

Details
Data
Provenance
Resources

Locality: Cruzeiro mine, São José da Safira, Doce valley, Minas Gerais, Brazil
Formula: NaAlSi₃O₈
Availability: Sold
Size: 12 x 10 x 7 cm - Cabinet
Tagged: pegmatite mineral

Large crystals of Albite variety cleavelandite to 2.5cm with Muscovite.

Albite

Formula: NaAlSi₃O₈
Crystal System: Triclinic
Crystal Habit: Blocky, Striated, Granular
Cleavage: Perfect, Good, None
Luster: Vitreous (Glassy)
Color: white, gray, greenish gray, bluish green, gray
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Uneven
Hardness: 7

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

SOLD

Albite

var. cleavelandite with tourmaline - #BN45379

Details
Data
Provenance
Resources

Locality: Cruzeiro mine, São José da Safira, Doce valley, Minas Gerais, Brazil
Formula: NaAlSi₃O₈
Availability: Sold
Size: 10 x 10 x 3 cm - Cabinet
Tagged: pegmatite mineral

Typical of Albite in a pegmatite where it form large bladed crystals to over 2cm such as this specimen. It is laced with tiny green, aciular tourmaline crystals. From the Buford Nichols collection.

Albite

Formula: NaAlSi₃O₈
Crystal System: Triclinic
Crystal Habit: Blocky, Striated, Granular
Cleavage: Perfect, Good, None
Luster: Vitreous (Glassy)
Color: white, gray, greenish gray, bluish green, gray
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Uneven
Hardness: 7

Collection: Dr. Buford L. Nichols Collection

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

SOLD

Beryl

#45374

Details
Data
Provenance
Resources

Locality: Beauregard mine, Alstead, Cheshire Co., New Hampshire, United States
Formula: Be₃Al₂Si₆O₁₈
Availability: Sold
Size: 12 x 10 x 7 cm - Cabinet
Tagged: beryllium , pegmatite mineral

A good example of the coarse crystal nature of pegmatites. This specimen contains a well-formed doubly terminated green, hexagonal Beryl crystal associated with Albite.

Beryl

Formula: Be₃Al₂Si₆O₁₈
Crystal System: Hexagonal
Crystal Habit: Crystalline - Coarse, Prismatic, Columnar
Cleavage: Imperfect, None, None
Luster: Vitreous - Resinous
Color: green, blue, yellow, colorless, pink
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 7.5-8

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

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