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Mixed Rare and FIne Minerals

Sunday, 25 April 2021 07:00 PM

Introducing the "Mixed Rare and FIne Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including adamite, calcite, creedite, hureaulite, and macfallite and more from places like Mina Ojuela, Mapimi, Durango, Mexico, Bou Azzer dist., Anti-Atlas, Morocco, Liberty (Hall) mine, Nye Co., Nevada, United States, Tip Top mine, Custer Co., South Dakota, United States, and Manganese mine, Copper Harbor, Keweenaw Co., Michigan.

Adamite

(manganoan) - #BN55626
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Zn2AsO4(OH) 
Availability
Available
Price
$95.00
Size
10 x 9 x 4 cm - Cabinet 

These crystals are 4 to 6mm with white rims and purple cores. I have not seen this habit and color combination before. All the crystals are sharp and well-formed. 


Adamite

Formula
Zn2AsO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Druse, Encrustations 
Cleavage
One Good 
Luster
Vitreous - Resinous 
Color
yellow, green, violet, pink, yellowish green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
Collection
Dr. Buford Nichols Collection
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Adamite

(cuprian) - #BN55627
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Zn2AsO4(OH) 
Availability
Available
Price
$95.00
Size
8.5 x 5 x 4 cm - Sm Cabinet 
Tagged
arsenate  

Bluish green glassy and excellent Adamite crystals to 1mm. The color as well as the size of the crystals chages across the specimen from a blue to green and about 1.5mm to less than 1mm.


Adamite

Formula
Zn2AsO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Druse, Encrustations 
Cleavage
One Good 
Luster
Vitreous - Resinous 
Color
yellow, green, violet, pink, yellowish green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
Collection
Dr. Buford Nichols Collection
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Calcite

(cobaltoan) - #55661
Locality
Bou Azzer dist., Anti-Atlas, Morocco 
Formula
CaCO3 
Availability
Available
Price
$45.00
Size
7 x 6 x 4.5 cm - Sm Cabinet 
Tagged
carbonate  

Pink translucent prismatic crystals of Calcite with "nail-head" terminations. The reddish brown clusters look to be limonite replacing Baryte.


Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
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Creedite

#55671
Locality
Liberty (Hall) mine, Nye Co., Nevada, United States 
Formula
Ca3Al2(SO4)(OH)2F8·2H2
Availability
Available
Price
$195.00
Size
6 x 5 x 3 cm - Sm Cabinet 

Lilac colored drussy Creedite crystals. Excellent specimen, this material is long gone.


Creedite

Formula
Ca3Al2(SO4)(OH)2F8·2H2
Crystal System
Monoclinic 
Crystal Habit
Granular, Radial, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
colorless, violet, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3.5 
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Hureaulite

#55657
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
Mn2+5(PO4)2(PO3OH)2·4H2
Availability
Available
Price
$40.00
Size
4.5 x 4.5 x 4 cm - Miniature 
Tagged
phosphate , pegmatite mineral  

Rich pink glassy crystals to 5mm. Under the scope you will also see many fine micro Hureaulite crystals and minor Jahnsite. The matrix is altered Triphylite with green Leucophosphite. 


Hureaulite

Formula
Mn2+5(PO4)2(PO3OH)2·4H2
Crystal System
Monoclinic 
Crystal Habit
Massive, Compact, Fibrous 
Cleavage
Distinct, None, None 
Luster
Vitreous - Greasy 
Color
red, white, grayish white, yellowish white, reddish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness

Macfallite

with Braunite - #PD55641
Locality
Manganese mine, Copper Harbor, Keweenaw Co., Michigan 
Formula
Ca2Mn3+3(SiO4)(Si2O7)(OH)3 
Availability
Available
Price
$145.00
Size
6 x 4 x 3 cm - Sm Cabinet 
Special Info
Type Locality 

Deep rusty red radial groups of Macfallite to 7mm in black massive Braunite. This material carries a Paul Moore label from the Universitty of Chicago. Moore described Macfallite so I am assuming this stuff is type material. Macfallite is limited to only six occurences worldwide.


Macfallite

Formula
Ca2Mn3+3(SiO4)(Si2O7)(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Aggregates, Twinning Common 
Cleavage
Perfect, None, None 
Luster
Vitreous - Silky 
Color
brown, maroon, reddish brown, pink 
Streak
brown 
Class
Monoclinic - Prismatic 
Hardness
5-5.5 
Special Info
Type Locality

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