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Recently Released Special Editions

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!

SOLD
Beryl - DL64352
Beryl - DL64352

Beryl

var. morganite - #DL64352
Locality
Bikita Pegmatite, Masvingo dist., Zimbabwe 
Formula
Be3Al2Si6O18 
Availability
Sold
Size
12 x 10 x 11 cm - Cabinet 
Tagged
beryllium , pegmatite mineral  

Large impressive specimen of light pink Beryl, variety morganite. 

Berylium averages about 3ppm in the Earth's crust. But in pegmatites it is relatively common in lithium-cesium-tantalum (LCT) pegmatites. It is one of the first to crystallize and can be found in just about any zome in zoned pegmatites.


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 
Collection
Dr. David London Collection
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SOLD
Bityite - DL63086
Bityite - DL63086

Bityite

with biotite - #DL63086
Locality
Harding mine, Taos Co., New Mexico, United States 
Formula
CaLiAl2(Si2BeAl)O10(OH)2 
Availability
Sold
Size
8 x 9 x 7.5 cm - Sm Cabinet 
Tagged
pegmatite mineral , lithium , bryllium  

Bityite from the wall rock of the Harding pegmatite in recrystallized biotite schist. The Bityite is rectangular in outline and colorless.


Bityite

Formula
CaLiAl2(Si2BeAl)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Encrustations, Platy, Pseudo Hexagonal 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
brown white, colorless, yellow, pearl white 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
5.5 
Collection
Dr. David London Collection
Mineralpedia
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SOLD
Columbite-(Fe) - DL63821
Columbite-(Fe) - DL63821

Columbite-(Fe)

#DL63821
Locality
Homestead claim, White Picacho dist., Yavapai Co., Arizona, Uniteds States 
Formula
Fe2+Nb2O6 
Availability
Sold
Size
10 x 6 x 4.5 cm - Cabinet 
Tagged
pegmatite mineral , niobium  
Special Info
Illustrated in London's book "Pegmatites" 

Thin bladed Columbite crystals to 3cm. Illustrated on page 74 Fig. 4-18e.


Columbite-(Fe)

Formula
Fe2+Nb2O6 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Striated 
Cleavage
Distinct, None, None 
Luster
Sub Metallic 
Color
black, brownish black 
Streak
blackish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
6 
Collection
Dr. David London Collection
Special Info
Illustrated in London's book "Pegmatites"
Mineralpedia
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SOLD
Columbite-(Fe) - DL64356
Columbite-(Fe) - DL64356

Columbite-(Fe)

with Albite - #DL64356
Locality
Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States 
Formula
Fe2+Nb2O6 
Availability
Sold
Size
7 x 5 x 2.5 cm - Sm Cabinet 
Tagged
pegmatite mineral , niobium  

Thin plate of Columbite across Albite matrix.


Columbite-(Fe)

Formula
Fe2+Nb2O6 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Striated 
Cleavage
Distinct, None, None 
Luster
Sub Metallic 
Color
black, brownish black 
Streak
blackish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
6 
Collection
Dr. David London Collection
Mineralpedia
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SOLD
Elbaite - DL63087
Elbaite - DL63087

Elbaite

var. rubellite & Pollucite - #DL63087
Locality
Tanco pegmatite, Bernic Lake, Manitoba, Canada 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
10.5 x 9.5 x 7 cm - Cabinet 
Tagged
pegmatite mineral  

Pink Elbaite, variety rubellite in white Pollucite matrix.


Elbaite

Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Striated, Prismatic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, green, yellow, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
7.5 
Collection
Dr. David London Collection
Mineralpedia
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Previously Sold Elbaite
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Mindat
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SOLD
Elbaite - DL64499
Elbaite - DL64499

Elbaite

with Lepidolite & Albite - #DL64499
Locality
White Rocks quarry, Middlesex Co., Connecticut, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
13 x 8.5 x 7 cm - Cabinet 
Tagged
pegmatite mineral  
Special Info
Illustrated in London's book "Pegmatites" 

Watermellon tourmaline, green rims with pink centers, in Albite and Quartz matrix. It is illustrated in Fig. 8-12a & b photos on page 138 in London's book "Pegmatites". In this figure London states "Pocket-margin transition from dark green tourmaline to colorless and pink tourmaline toward the pocket zone."


Elbaite

Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Striated, Prismatic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, green, yellow, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
7.5 
Collection
Dr. David London Collection
Special Info
Illustrated in London's book "Pegmatites"
Mineralpedia
View Elbaite
On Dakota Matrix
Previously Sold Elbaite
On Dakota Matrix
Other Available Elbaite
WebMineral
View Elbaite
Mindat
View Elbaite

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