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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
Tourmaline var. rubellite - DL63808
Tourmaline var. rubellite - DL63808

Tourmaline Var. Rubellite

in Lepidolite - #DL63808
Locality
Stewart mine, Pala dist., San Diego Co., California, United States 
Formula
A(D3)G6(T6O18)(BO3)3X3Z 
Availability
Sold
Size
15 x 7 x 4.5 cm - Cabinet 
Tagged
pegmatite mineral  

Pink prismatic Elbatite tourmaline, variety rubellite in light purple Lepidolite. Most of the rubellite is randomly positioned. But some areas show where the rubellite eminates from a common center point.


Collection
Dr. David London Collection
On Dakota Matrix
Previously Sold Tourmaline Var. Rubellite
On Dakota Matrix
Other Available Tourmaline Var. Rubellite
WebMineral
View Tourmaline Var. Rubellite
Mindat
View Tourmaline Var. Rubellite
SOLD
Triphylite - DL63812
Triphylite - DL63812

Triphylite

#DL63812
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
LiFe2+PO4 
Availability
Sold
Size
9 x 7.5 x 5 cm - Sm Cabinet 
Tagged
ore mineral , phosphate , pegmatite mineral , lithium  

Triphylite is a primary pegmatite mineral. Most of the secondary phosphate minerals occur in Triphylite. This specimen is a nice bluish green and glassy in places. It is not altered in any way and is just a chunk of a cleavable mass.

The specimen is illustrated in the phoshate section of London's book on page 61, figure 4-12h.


Triphylite

Formula
LiFe2+PO4 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Massive - Granular 
Cleavage
Perfect, Good, None 
Luster
Greasy (Oily) 
Color
gray, bluish gray, brownish, blackish 
Streak
grayish white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
4-5 
Collection
Dr. David London Collection
On Dakota Matrix
Previously Sold Triphylite
On Dakota Matrix
Other Available Triphylite
WebMineral
View Triphylite
Mindat
View Triphylite

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