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London Pegmatite Specimens

Tuesday, 30 July 2024 01:00 PM

London wrote the book called "PEGMATITES". It is the most in-depth book on the geology and mineralogy of pegmatites to-date. This Special Edition will include specimens used as illustrations in London's book. If you like pegmatites do not miss this one!

Lepidolite

with Spodumene & Albite - #AH62035

$40.00 - Available
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Locality: Harding mine, Taos Co., New Mexico, United States
Formula: K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂
Availability: Available
Price: $40.00
Size: 9 x 6 x 7 cm - Sm Cabinet
Tagged: pegmatite mineral , lithium

Lilac colored Lepidolite intergrwon with white Spodumene and Albite.

Lepidolite

Formula: K(Li,Al)3(Si,Al)4O10(F,OH)2
Crystal System: Monoclinic
Crystal Habit: Platy, Foliated, Massive
Cleavage: Perfect, None, None
Luster: Vitreous - Pearly
Color: colorless, gray white, lilac, yellowish, white
Streak: white
Class: Monoclinic
Fracture: Uneven
Hardness: 2.5-3

Collection: Arnold G Hampson Collection

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

Montebrasite

altering to Scorzalite, Kulanite, Brazilianite & apatite - #DL63096

$75.00 - Available
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Locality: Independence pegmatite, White Picacho dist., Yavapai Co., Arizona, United States
Formula: LiAlPO₄(OH)
Availability: Available
Price: $75.00
Size: 11 x 7 x 5.5 cm - Cabinet
Tagged: phosphate , pegmatite mineral , lithium

Montebrasite altered to Scorzalite (blue), Kulanite (dark green), and Brazilianite. It is sawed and polished on one side and shows the these alterations along fractures and cleavage plains.

Montebrasite

Formula: LiAlPO₄(OH)
Crystal System: Triclinic
Crystal Habit: Massive - Granular, Prismatic
Cleavage: Perfect, Good, Distinct
Luster: Vitreous - Greasy
Color: bluish, colorless, greenish, greenish gray, gray white
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Brittle - Conchoidal
Hardness: 5.5-6

Collection: Dr. David London Collection

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

Orthoclase

#DL63089

$85.00 - Available
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Locality: White Queen Mine, Pala, San Diego Co., California, United States
Formula: K(AlSi₃)O₈
Availability: Available
Price: $85.00
Size: 12.5 x 6 x 4.5 cm - Cabinet
Tagged: pegmatite mineral

While a pegmatite is crystallizing, often fluids change chemistry and alters or etches previously crystallized minerals. In this case at the center of this specimen has been etched and then overgrown with a new phase of Orthoclase.