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Rare Minerals

Saturday, 23 March 2019 12:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including acanthite, aragonite, arsenowagnerite, avdoninite, chlorargyrite, and chrysocolla and more from places like Santa Eulalia, Chihuahua, Mexico, Naica, Mun. de Saucillo, Chihuahua, Mexico, Tolbachik Volcano, Kamchatka, Russia, Teutonic Bore Mine, Ten Mile Outcamp, Leonora Shire, Western Australia, Australia, and Twin Buttes mine, Pima Co., Arizona, United States.

Acanthite

with Fluorite - #RW50565
Locality
Santa Eulalia, Chihuahua, Mexico 
Formula
Ag2
Availability
Sold
Size
10 x 5.5 x 4 cm - Cabinet 
Tagged
sulfide , silver  

Rich specimen with a great amount of Acanthite as oddly shaped crystals, mostly modified cubic forms. It is also rich in yellowish Fluorite. Some of the cubes you can see in the photos are actually the Fluorite coated with Acanthite.


Acanthite

Formula
Ag2
Crystal System
Monoclinic 
Crystal Habit
Blocky, Skeletal, Arborescent 
Cleavage
poor to none 
Luster
Metallic 
Color
lead gray, gray, iron black 
Streak
shining black 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
2-2.5 
Collection
Robert J. Waidler Collection
Mineralpedia
View Acanthite
On Dakota Matrix
Previously Sold Acanthite
On Dakota Matrix
Other Available Acanthite
WebMineral
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Mindat
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Aragonite

#RW50580
Locality
Naica, Mun. de Saucillo, Chihuahua, Mexico 
Formula
CaCO3 
Availability
Sold
Size
7 x 3.5 x 5 cm - Sm Cabinet 
Tagged
carbonate  

White spiky excellent crystals of Aragonite with individual crystals to 5mm. Very nice specimen.


Aragonite

Formula
CaCO3 
Crystal System
Orthorhombic 
Crystal Habit
Pseudo Hexagonal, Columnar, Fibrous 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, gray, yellowish white, reddish white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
3.5-4 
Collection
Robert J. Waidler Collection
Mineralpedia
View Aragonite
On Dakota Matrix
Previously Sold Aragonite
On Dakota Matrix
Other Available Aragonite
WebMineral
View Aragonite
Mindat
View Aragonite

Arsenowagnerite

#50453
Locality
Tolbachik Volcano, Kamchatka, Russia 
Formula
Mg2(AsO4)F 
Availability
Sold
Size
1.5 x 1.5 x 1 cm - Thumbnail 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Type & Only Locality 
Special Info
Author's Material 

This is a specimen out of Dr. Igor Pekov's collection and was used to study this new species. This is the only known locality. The mineral forms translucent, glassy light green crystals with Hematite.


Special Info
XRD Confirmed
Special Info
EDS Confirmed
Special Info
Type & Only Locality
Special Info
Author's Material

Avdoninite

#50455
Locality
Tolbachik Volcano, Kamchatka, Russia 
Formula
K2Cu5Cl8(OH)4·H2
Availability
Sold
Size
3.5 x 1.5 x 1 cm - Miniature 
Tagged
copper  
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

Glassy bright green crystals in vuggy scoria.  Identified by Dr. Igor Pekov.


Avdoninite

Formula
K2Cu5Cl8(OH)4·H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Druse, Tabular 
Luster
Vitreous (Glassy) 
Color
green 
Streak
pale green 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed

Chlorargyrite

#50561
Locality
Teutonic Bore Mine, Ten Mile Outcamp, Leonora Shire, Western Australia, Australia 
Formula
AgCl 
Availability
Sold
Size
5 x 4 x 3.5 cm - Miniature 
Tagged
silver  

Limonitic, spongy mass loaded with yellow to grey waxy groups of Chlorargyrite to 5mm. The groups are generally formless masses but many crystal faces can still be seen.


Chlorargyrite

Formula
AgCl 
Crystal System
Isometric 
Crystal Habit
Massive, Columnar 
Cleavage
None, None, None 
Luster
Adamantine - Resinous 
Color
purplish gray, green, white, colorless 
Streak
white 
Class
Isometric - Hexoctahedral 
Fracture
Sectile 
Hardness
1-1.5 
Collection
Robert J. Waidler Collection

Chrysocolla

with Cuprite & Tenorite - #RW50569
Locality
Twin Buttes mine, Pima Co., Arizona, United States 
Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Availability
Sold
Size
10 x 4.5 x 5 cm - Cabinet 
Tagged
copper  

Massive specimen with rich bluish green Chrysocolla veins to 5mm. All the deeper green is also Chrysocolla. The deep red is the Cuprite.


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 
Collection
Robert J. Waidler Collection

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