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Mixed Minerals

Friday, 04 June 2021 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including silver, sphalerite, thorianite, titanite, zircon, and zubkovaite and more from places like Oliver, British Columbia, Canada, Homestake mine, Lawrence Co., South Dakota, United States, Ceylon, Sri Lanka, Iveland, Setesdal Valley, Norway, Buffalo Creek, South Platte Pegmatite dist., Jefferson Co., Colorado, United States, and Tolbachik Volcano, Kamchatka, Russia.

Silver

with Hessite - #55918
Locality
Oliver, British Columbia, Canada 
Formula
Ag 
Availability
Sold
Size
6 x 3 x 1 cm - Sm Cabinet 
Tagged
native element , tellurium  

Heavy specimen composed of Galena with black Hesste and Silver. You can tell what the Hessite is by gently scratching the black areas. It will be sectile. The Silver is obvious as in the second photo.


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
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Sphalerite

with Quartz & Pyrite - #55903
Locality
Homestake mine, Lawrence Co., South Dakota, United States 
Formula
ZnS 
Availability
Sold
Size
12 x 5 x 3 cm - Cabinet 
Tagged
sulfide  

A typical plate of what is locally called "water course mineralization", basically it is much like alpine cleft mineralization just below the surface. The plate consist of clear Quartz, black Sphalerite crystals to 3mm and Galena crystals to 2mm.


Sphalerite

Formula
ZnS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Granular, Colloform 
Cleavage
Perfect, Perfect, Perfect 
Luster
Resinous - Greasy 
Color
brown, yellow, red, green, black 
Streak
brownish white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 
SOLD
Thorianite - 55888
Thorianite - 55888

Thorianite

#55888
Locality
Ceylon, Sri Lanka 
Formula
ThO2 
Availability
Sold
Size
0.3 x 0.3 x 0.3 cm - Thumbnail 

Cubic 3mm crystal.


Thorianite

Formula
ThO2 
Crystal System
Isometric 
Crystal Habit
Pseudo Hexagonal, Granular 
Cleavage
Imperfect, Imperfect, Imperfect 
Luster
Metallic 
Color
brownish black, green, green black, gray green, yellow 
Streak
greenish gray 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness

Titanite

yttrium-bearing - #53839
Locality
Iveland, Setesdal Valley, Norway 
Formula
CaTiSiO5 
Availability
Sold
Size
4.5 x 2 x 1 cm - Miniature 

Brown crystal segment of yttrium-bearing Titanite. It is terminated all around except for the detachment on the one end.


Titanite

Formula
CaTiSiO5 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Crystalline - Fine 
Cleavage
Distinct, Imperfect, Imperfect 
Luster
Adamantine - Resinous 
Color
reddish brown, gray, yellow, green, red 
Streak
reddish white 
Class
Monoclinic - Prismatic 
Fracture
Sub Conchoidal 
Hardness
5-5.5 
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SOLD
Zircon - 51458
Zircon - 51458

Zircon

var. cyrtolite - #51458
Locality
Buffalo Creek, South Platte Pegmatite dist., Jefferson Co., Colorado, United States 
Formula
ZrSiO4 
Availability
Sold
Size
12 x 8 x 4 cm - Cabinet 

A large brick red zircan chunk of cyrtolite, a variety of Zircon containing U & TH.


Zircon

Formula
ZrSiO4 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Tabular, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Adamantine 
Color
brown, reddish brown, colorless, gray, green 
Streak
white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Uneven 
Hardness
7.5 
Mineralpedia
View Zircon
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On Dakota Matrix
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Mindat
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SOLD
Zubkovaite - 52425
Zubkovaite - 52425

Zubkovaite

#52425
Locality
Tolbachik Volcano, Kamchatka, Russia 
Formula
Ca3Cu3(AsO4)4 
Availability
Sold
Size
Micromount 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Type & Only Locality 
Special Info
Author's Material 

A single 1mm crystal grain of sky blue Zubkovaite.

This is a single locality mineral. The specimen originated from Dr. Igor Pekov, who was the lead author and described the new mineral. 

The more exact locality is: Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Krai, Russia


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

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