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1 item @ $125.00  

Three Little Pegmatites

Friday, 12 February 2021 08:00 AM

Three famous phosphate loaded pegmatites - The Palermo, Hagendorf, and Tip Top Pegmatites.

Leucophosphite

with Jahnsite, Rockbridgeite etc - #55135
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
KFe3+2(PO4)2(OH)·2H2
Availability
Sold
Size
3 x 2 x 1 cm - Thumbnail 
Tagged
phosphate , pegmatite mineral  

Here ya go: 26 small specimens, the largest is 3cm and the smallest is 9mm. There are micro crystals the said minerals on all of the specimens plus Hureaulite and Laueite and who knows what else - I haven't looked at them all.


Leucophosphite

Formula
KFe3+2(PO4)2(OH)·2H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Dull 
Color
brown, brownish yellow, colorless, greenish, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3.5 

Montgomeryite

with Roscherite & Englishite - #BN55086
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Availability
Sold
Size
6 x 4.5 x 2 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

A Beryl matrix specimen with a typical assemblage of crystalline layers of pinkish red Roscherite, pearly white balls of Englishite and red groups of Montgomeryite.


Montgomeryite

Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Crystal System
Monoclinic 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, yellowish, white, green, red 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Dr. Buford Nichols Collection

Montgomeryite

with Englishite and Robertsite - #BN55087
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Availability
Sold
Size
10 x 7 x 3.5 cm - Cabinet 
Tagged
phosphate , pegmatite mineral  

A Quartz matrix specimen with flat-lying red laths of Montgomerite from 1 to 2mm and white balls of Englishite and tiny deep red Robertsite, less than 0.25mm.


Montgomeryite

Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Crystal System
Monoclinic 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, yellowish, white, green, red 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Dr. Buford Nichols Collection

Montgomeryite

with Hurlbutite - #BN55088
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Availability
Sold
Size
10 x 7 x 2.5 cm - Cabinet 
Tagged
phosphate , pegmatite mineral  

An excellent specimen with rich coverage of bead-like, colorless Hurlbutite, red groups of lath-like Montgomeryite to about 0.75mm, dark red Roberite and/or Mitridatite (green) and minor Englishite.


Montgomeryite

Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Crystal System
Monoclinic 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, yellowish, white, green, red 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Dr. Buford Nichols Collection

Palermoite

on Quartz - #BN55009
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
Li2SrAl4(PO4)4(OH)4 
Availability
Sold
Size
5 x 3.5 x 3 cm - Miniature 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

Slender Palermoite crystals to about 1mm and less. There are approximately 10 crystals. Quartz matrix.


Palermoite

Formula
Li2SrAl4(PO4)4(OH)4 
Crystal System
Orthorhombic 
Crystal Habit
Fibrous, Aggregates 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Adamantine 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Splintery 
Hardness
5.5 
Collection
Dr. Buford Nichols Collection
Special Info
Type Locality

Perloffite

#BN55002
Locality
Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany 
Formula
BaMn2+2Fe3+2(PO4)3(OH)3 
Availability
Sold
Size
6 x 4 x 3 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

A black shiny Perloffite crystal grain to about 1mm in Wolfeite, Ludlamite, and Kryzhanovskite matrix.


Perloffite

Formula
BaMn2+2Fe3+2(PO4)3(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Spear Head 
Cleavage
Perfect, None, None 
Luster
Vitreous - Adamantine 
Color
brownish black, greenish brown, dark brown, black 
Streak
greenish yellow 
Class
Monoclinic - Prismatic 
Hardness
Collection
Dr. Buford Nichols Collection

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