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Mixed Minerals

Friday, 11 November 2022 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including baryte, bastnasite-(ce), bigcreekite, calaverite, cerchiaraite-(fe), and chrysocolla and more from places like Northumberland mine, Nye Co., Nevada, United States, Andakatany, Manandriana, Amoron'i Mania, Madagascar, Esquire #7 claim, Big Creek, Fresno Co., California, United States, Ajax mine, Cripple Creek dist., Teller Co., Colorado, United States, and Unknown Locality Unknown.

Baryte

#59583
Locality
Northumberland mine, Nye Co., Nevada, United States 
Formula
BaSO4 
Availability
Sold
Size
10 x 9 x 8 cm - Cabinet 

You don't see much of these Barytes from this mine on the market. This is a large Baryte cluster with a huge crystal measuring 7cm! The color is a dark grey with amber terminations. All the crystals are sharply terminated. There is no damage. Great impressive specimen.


Baryte

Formula
BaSO4 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Massive - Fibrous 
Cleavage
Perfect, Perfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, grayish white, brownish white, dark brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Mineralpedia
View Baryte
On Dakota Matrix
Previously Sold Baryte
On Dakota Matrix
Other Available Baryte
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Mindat
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Bastnasite-(Ce)

#59344
Locality
Andakatany, Manandriana, Amoron'i Mania, Madagascar 
Formula
CeCO3
Availability
Sold
Size
4 x 3 x 4 cm - Miniature 
Tagged
carbonate , REE mineral  

Dark root beer colored thick plates.


Bastnasite-(Ce)

Formula
CeCO3
Crystal System
Hexagonal 
Crystal Habit
Prismatic, Massive - Granular 
Cleavage
Imperfect, Indistinct, None 
Luster
Vitreous - Greasy 
Color
yellow, reddish brown 
Streak
white 
Class
Hexagonal - Ditrigonal Dipyramidal 
Fracture
Uneven 
Hardness
4-5 

Bigcreekite

#59668
Locality
Esquire #7 claim, Big Creek, Fresno Co., California, United States 
Formula
BaSi2O5·4H2
Availability
Sold
Size
2.5 x 1.5 x 1.5 cm - Thumbnail 
Special Info
Type Locality 

Colorless to white plates of Bigcreekite in a 5x5mm area with deep striations. Bigcreekite is a very rare barium silicate occuring at three localities in California but no where else. The specimen is from the Robert Walstrom collection recently obtained. 


Bigcreekite

Formula
BaSi2O5·4H2
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Subhedral Crystals 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Pearly 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
2-3 
Collection
Robert E. Walstrom collection
Special Info
Type Locality

Calaverite

#AH59661
Locality
Ajax mine, Cripple Creek dist., Teller Co., Colorado, United States 
Formula
AuTe2 
Availability
Sold
Size
2.5 x 1.5 x 1.5 cm - Thumbnail 
Tagged
tellurium , gold  

Four crystals, the longest to 5mm.


Calaverite

Formula
AuTe2 
Crystal System
Monoclinic 
Crystal Habit
Striated, Massive, Crystalline - Fine 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, yellowish white 
Streak
green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
2.5 
Collection
Arnold G Hampson Collection

Cerchiaraite-(Fe)

#59669
Locality
Esquire #7 claim, Big Creek, Fresno Co., California, United States 
Formula
Ba4Fe43+O3(OH)3(Si4O12)[Si2O3(OH)4]Cl 
Availability
Available
Price
$75.00
Size
2 x 1.5 x 1 cm - Thumbnail 

Dark blue massive Cerchiaraite-(Fe). The Esquire #7 deposit share type localities with two other localities.


Cerchiaraite-(Fe)

Collection
Robert E. Walstrom collection

Chrysocolla

#59682
Locality
Unknown Locality Unknown 
Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Availability
Sold
Size
19 x 14 x 1.7 cm - Cabinet 

Not sure where this originated but possibly the Bagdad mine in Arizona. Regardless, it a beautiful slab Chrysocolla in brecciated rock. There are zones around the Chrysocolla that are thinly banded Malachite. This may have been repaired or at least stabilized.


Chrysocolla

Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Crystal System
Orthorhombic 
Crystal Habit
Botryoidal, Earthy, Stalactitic 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
green, bluish green, blue, blackish blue, brown 
Streak
light green 
Class
Orthorhombic 
Fracture
Brittle - Sectile 
Hardness
2.5-3.5 

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