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Rare Mineral Species

Friday, 09 August 2019 06:30 PM

Introducing the "Rare Mineral Species" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including monazite-(ce), montebrasite, perovskite, petrovicite, rhodochrosite and more from places like near Buffalo Creek, Jefferson Co., Colorado, United States., Telirio mine, Linopolis, Minas Gerais, Brazil, Afrikanda Massif, Kola Peninsula, Russia, Bambolla mine, Moctezuma, Sonora, Mexico, Pachapaqui dist, Bolognesi prov., Ancash dept., Peru, and Branchville, Fairfield Co., Connecticut, United States.

Monazite-(Ce)

#51105
Locality
near Buffalo Creek, Jefferson Co., Colorado, United States. 
Formula
CePO4 
Availability
Sold
Size
10 x 5.5 x 3 cm - Cabinet 
Tagged
phosphate  

Brick red formless 1cm crystals suspended in matrix.


Monazite-(Ce)

Formula
CePO4 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Twinning Common 
Cleavage
Distinct, Indistinct, None 
Luster
Adamantine - Resinous 
Color
brown, colorless, greenish, gray white, yellow 
Streak
grayish white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5-5.5 
SOLD
Montebrasite - 50441
Montebrasite - 50441

Montebrasite

(twin) - #50441
Locality
Telirio mine, Linopolis, Minas Gerais, Brazil 
Formula
LiAlPO4(OH) 
Availability
Sold
Size
2.5 x 1.5 x 1.2 cm - Thumbnail 
Tagged
phosphate , pegmatite mineral  

Honey colored, striated and very lustrous Montebrasite crystal. Crystals of Montebrasite and fairly rare worldwide.


Montebrasite

Formula
LiAlPO4(OH) 
Crystal System
Triclinic 
Crystal Habit
Massive - Granular, Prismatic 
Cleavage
Perfect, Good, Distinct 
Luster
Vitreous - Greasy 
Color
bluish, colorless, greenish, greenish gray, gray white 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Conchoidal 
Hardness
5.5-6 

Perovskite

#51090
Locality
Afrikanda Massif, Kola Peninsula, Russia 
Formula
CaTiO3 
Availability
Sold
Size
2 x 1.7 x 1.9 cm - Thumbnail 

Single black, shiny, cubooctahedral crystal to 1.7cm. Excellent single crystal.


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 

Petrovicite

#39485
Locality
Bambolla mine, Moctezuma, Sonora, Mexico 
Formula
Cu3HgPbBiSe5 
Availability
Sold
Size
2 x 1.5 x 1 cm - Thumbnail 
Tagged
sulfide , copper  

Black to dark grey crystal grains from 0.5 to 1mm in matrix. Cureton label.


Petrovicite

Formula
Cu3HgPbBiSe5 
Crystal System
Orthorhombic 
Crystal Habit
Microscopic Crystals, Tabular 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
gray 
Class
Orthorhombic - Dipyramidal 
Hardness

Rhodochrosite

#18140
Locality
Pachapaqui dist, Bolognesi prov., Ancash dept., Peru 
Formula
MnCO3 
Availability
Sold
Size
6.5 x 5 x 3 cm - Sm Cabinet 
Tagged
carbonate  

Aesthetic specimen composed of tiny 1mm pink rhombic crystals and tiny Quartz crystals.


Rhodochrosite

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness

Rhodochrosite

with Lithiophyllite & Dickinsonite - #51108
Locality
Branchville, Fairfield Co., Connecticut, United States 
Formula
MnCO3 
Availability
Sold
Size
5.5 x 4.5 x 2.5 cm - Sm Cabinet 
Tagged
carbonate  

Pink thick plates or rhombs protruding from matrix with the phosphates of Lithiophyllite (salmon) & Dickinsonite (green).


Rhodochrosite

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness

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