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Three Little Pegmatites

Friday, 12 February 2021 08:00 AM

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

Goyazite

with Childrenite - #BN55121
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
SrAl3(PO4)(PO3OH)(OH)6 
Availability
Sold
Size
4.5 x 4 x 4 cm - Miniature 
Tagged
phosphate , pegmatite mineral  

Rich coverage of tiny white to yellowish stained, well-formed Goyazite crystals to 0.5mm on Quartz with minor Childrenite.


Goyazite

Formula
SrAl3(PO4)(PO3OH)(OH)6 
Crystal System
Trigonal 
Crystal Habit
Blocky - Rhombohedral, Disseminated 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
lemon yellow, pink, colorless 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
4-5 
Collection
Dr. Buford Nichols Collection
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Hagendorfite

in Triphylite - #BN54994
Locality
Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany 
Formula
NaCaMn2+Fe2+2(PO4)3 
Availability
Sold
Size
10 x 6 x 4 cm - Cabinet 
Tagged
phosphate , pegmatite mineral  

Dull, black zones of Hagendorfite in Triphylite. Ex. Dr. F. Krantz collection, with tag (see prov. tab).


Hagendorfite

Formula
NaCaMn2+Fe2+2(PO4)3 
Crystal System
Monoclinic 
Crystal Habit
Massive 
Cleavage
Good, Poor, None 
Color
greenish black 
Streak
gray green 
Class
Monoclinic - Prismatic 
Hardness
3.5 
Collection
Dr. Buford Nichols Collection

Hurlbutite

with Montgomeryite & Englishite - #BN55085
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
CaBe2P2O8 
Availability
Sold
Size
9 x 3 x 3 cm - Sm Cabinet 
Tagged
phosphate , beryllium , pegmatite mineral  

Rich specimen full of colorless beads of Hurlbutite to about 0.75mm scattered with 1mm groups of red Montgomeryite, tiny rhombs if Whitlockite and white, pearly tufts of Englishite. Beryl matrix, excellent specimen.


Hurlbutite

Formula
CaBe2P2O8 
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
None, None, None 
Luster
Vitreous - Greasy 
Color
colorless, greenish white, yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. Buford Nichols Collection

Hydroxylapatite

on Quartz - #BN55004
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
Ca5(PO4)3OH 
Availability
Sold
Size
6 x 4.5 x 3 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

1-2mm prismatic, snow white Hydroxylapatite crystals lining a Quartz vug.


Collection
Dr. Buford Nichols Collection

Hydroxylapatite

with Goyazite & Brazilianite - #BN55019
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
Ca5(PO4)3OH 
Availability
Sold
Size
2.5 x 2.5 x 2 cm - Thumbnail 
Tagged
phosphate , pegmatite mineral  

1-3mm white Hydroxylapatite crystals with 0.25mm white to yellow stained crystals of Goyazite.


Collection
Dr. Buford Nichols Collection

Laueite

with Pseudolaueite & Strunzite - #PD55049
Locality
Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany 
Formula
Mn2+Fe3+2(PO4)2(OH)2·8H2
Availability
Sold
Size
7 x 6 x 4 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Deep yellow crystals of Laueite crystals with inclined terminations. An old John Parnau label has Pseudolaueite occuring on the specimen, but it is hard to determine this. There is however, some good showings of straw-like Strunzite to 3mm.


Laueite

Formula
Mn2+Fe3+2(PO4)2(OH)2·8H2
Crystal System
Triclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellow orange, honey brown, light brown 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
Mineralpedia
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