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Mixed Minerals

Friday, 09 October 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including andorite, belyankinite, horvathite-(y), pyromorphite, and wagnerite and more from places like Itos mine, near Oruro City, Oruro Dept., Bolivia, Kedykverpakhk Mt., Lovozero Massif, Kola Peninsula, Russia, Mont Saint-Hilaire, Rouville Co., Quebec, Canada, Broken Hill, New South Wales, Australia, and Kjerulfine mine, Nedre Havredal, Havredal, Telemark, Norway.

Andorite

with Pyrite - #BC52637
Locality
Itos mine, near Oruro City, Oruro Dept., Bolivia 
Formula
Ag15Pb18Sb47S96 
Availability
Available
Price
$195.00
Size
7 x 7 x 2.5 cm - Sm Cabinet 

Several groups of tabular and striated rare Andorite crystals. Individual crystals maesure up to 6mm. 


Andorite

Formula
PbAgSb3S6 
Crystal System
Orthorhombic 
Crystal Habit
Striated, Tabular 
Cleavage
None, None, None 
Luster
Metallic 
Color
grayish yellow, dark gray, steel gray 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3-3.5 
Collection
Barbara Cureton Collection
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Belyankinite

#PD54037
Locality
Kedykverpakhk Mt., Lovozero Massif, Kola Peninsula, Russia 
Formula
Ca1-2(Ti,Nb)5O12 · 9H2O (?) 
Availability
Available
Price
$35.00
Size
3 x 1.5 x 1.5 cm - Thumbnail 
Tagged
pegmatite mineral  

The Belyankinite is the cream colored plate, a two-locality titanium-niobium mineral found at two localities worldwide.


Belyankinite

Formula
Ca1-2(Ti,Zr,Nb5O12*9(H2O) (?) 
Crystal System
No Crystals 
Crystal Habit
Platy, Aggregates 
Cleavage
Perfect 
Luster
Vitreous - Greasy 
Color
yellow, brownish yellow 
Class
Amorphous - No Crystals 
Fracture
Brittle - Uneven 
Hardness
2-3 

Horvathite-(Y)

#40979
Locality
Mont Saint-Hilaire, Rouville Co., Quebec, Canada 
Formula
NaY(CO3)F2 
Availability
Available
Price
$125.00
Size
5 x 2.5 x 2 cm - Miniature 
Tagged
carbonate , REE mineral  
Special Info
Type Locality 

It was hard to capture all the crystals of Horvathite in this specimen. But they are honey colored, tabular and peculiar looking to 2mm. In association are light pink Rhodochrosite crystals. Horvathite-(Y) is not only a REE mineral but it is only found at MSH and the Saint-Amable sill in Quebec.


Horvathite-(Y)

Formula
NaY(CO3)F2 
Crystal System
Orthorhombic 
Crystal Habit
Tabular 
Cleavage
Very Good, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale yellow, pale beige 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Special Info
Type Locality

Pyromorphite

#BC52629
Locality
Broken Hill, New South Wales, Australia 
Formula
Pb5(PO4)3Cl 
Availability
Available
Price
$225.00
Size
8 x 6 x 4.5 cm - Sm Cabinet 
Tagged
phosphate  

Galena with a hollowed vug totally lined with brown, thin Pyromorphite crystals to 6mm. 


Pyromorphite

Formula
Pb5(PO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Crystals short to long prismatic, acicular, often hoppered terminations, rarely tabular to equant; radiating to branching groups, tapering to a point. Commonly rounded, globular, reniform, botryoidal. 
Cleavage
On {1011}, interrupted 
Luster
Resinous to subadamantine 
Color
Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorless 
Streak
White 
Geological Setting
A secondary mineral in the oxidized zone of lead deposits 
Class
Hexagonal, 6/m - Dipyramidal 
Fracture
Uneven to subconchoidal 
Hardness
3.5–4 
Collection
Barbara Cureton Collection

Wagnerite

with apatite - #DP54029
Locality
Kjerulfine mine, Nedre Havredal, Havredal, Telemark, Norway 
Formula
Mg2PO4
Availability
Available
Price
$50.00
Size
4 x 4 x 3 cm - Miniature 
Tagged
phosphate  

Yellow cores in the center of an unknown lilac colored mineral.


Wagnerite

Formula
Mg2PO4
Crystal System
Monoclinic 
Crystal Habit
Massive, Striated 
Cleavage
Imperfect, Imperfect, Poor 
Luster
Vitreous (Glassy) 
Color
greenish, gray white, grayish, yellow, reddish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Splintery 
Hardness
5-5.5 

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