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Mixed Minerals

Friday, 31 July 2020 08:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including gonyerite, goyazite, lepidolite, metahewettite, perloffite, and perovskite and more from places like Långban, Filipstad, Värmland, Sweden, Palermo mine, Groton, Grafton Co., New Hampshire, United States, Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States, Ambrosia Lake, McKinley Co., New Mexico, United States, Big Chief mine, Pennington Co., South Dakota, United States, and Långharsholmen, Alnö, Sundsvall, Västernorrland, Sweden.

Gonyerite

#PD53750
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Mn2+5Fe3+(Si3Fe3+)O10(OH)8 
Availability
Sold
Size
3 x 1.7 x 0.3 cm - Thumbnail 
Special Info
Type Locality 

Red, radial, flat-lying crystals to 3mm wide. Good specimen.


Gonyerite

Formula
Mn2+5Fe3+(Si3Fe3+)O10(OH)8 
Crystal System
Orthorhombic 
Crystal Habit
Radial, Platy 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
dark brown, brownish black, bright green 
Streak
chocolate brown 
Class
Orthorhombic 
Fracture
Flexible 
Hardness
2.5 
Collection
Don Phillips Collection
Special Info
Type Locality
Mineralpedia
View Gonyerite
On Dakota Matrix
Previously Sold Gonyerite
On Dakota Matrix
Other Available Gonyerite
WebMineral
View Gonyerite
Mindat
View Gonyerite
SOLD
Goyazite - PD53802
Goyazite - PD53802

Goyazite

#PD53802
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
SrAl3(PO4)(PO3OH)(OH)6 
Availability
Sold
Size
6 x 5 x 4 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Al Kidwell obtained this specimen from Gunnar Bjareby, which was collected in 1939. There is one nice crystal as shown in the second photo. There is possibly one other crystal but I wasn't sure. The rest of the white you see are actually waterclear Quartz crystals.


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 
Mineralpedia
View Goyazite
On Dakota Matrix
Previously Sold Goyazite
On Dakota Matrix
Other Available Goyazite
WebMineral
View Goyazite
Mindat
View Goyazite
SOLD
Lepidolite - AH53777
Lepidolite - AH53777

Lepidolite

#AH53777
Locality
Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States 
Formula
K(Li,Al)3(Si,Al)4O10(F,OH)2 
Availability
Sold
Size
8 x 6.5 x 4 cm - Sm Cabinet 
Tagged
pegmatite mineral  

Compact crystalline mass of lilac Lepidolite. Self-collected by Hampson in 1945.


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
SOLD
Metahewettite - AH53810
Metahewettite - AH53810

Metahewettite

#AH53810
Locality
Ambrosia Lake, McKinley Co., New Mexico, United States 
Formula
CaV5+6O16·3H2
Availability
Sold
Size
3 x 2 x 2.5 cm - Thumbnail 
Tagged
vanadium  

Weird hairy rusty red crystals of Metahewettite.


Metahewettite

Formula
CaV5+6O16·3H2
Crystal System
Monoclinic 
Luster
Silky 
Color
red 
Streak
brownish red 
Class
Monoclinic - Prismatic 
Hardness
Collection
Arnold G Hampson Collection

Perloffite

in Ludlamite - #BN53829
Locality
Big Chief mine, Pennington Co., South Dakota, United States 
Formula
BaMn2+2Fe3+2(PO4)3(OH)3 
Availability
Available
Price
$195.00
Size
Micromount 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

Black, sharp, suberb, sharply pointed Perloffite crystals to about 0.75mm in Ludlamite. Very rare barium phosphate. Type Locality.


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
Special Info
Type Locality

Perovskite

var. knopite - #PD53752
Locality
Långharsholmen, Alnö, Sundsvall, Västernorrland, Sweden 
Formula
CaTiO3 
Availability
Available
Price
$75.00
Size
8 x 4.5 x 4 cm - Sm Cabinet 

Knopite is a variety of perovskite rich in cerium. The crystals are reddish brown and dypramidal to about 1mm and are quite nice. 


Perovskite

Formula
CaTiO3 
Crystal System
Orthorhombic 
Crystal Habit
Reniform, Pseudo Cubic, Pseudo Hexagonal 
Cleavage
Good, Good, Good 
Luster
Sub Metallic 
Color
black, reddish brown, pale yellow, yellowish orange 
Streak
grayish white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
5.5 
Collection
Don Phillips Collection

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