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Rare & Mixed Minerals

Thursday, 16 June 2022 06:00 PM

Introducing the "Rare & Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including simplotite, sperrylite, stichtite, tetradymite, villiaumite, and vladimirivanovite and more from places like Peanut mine, Uravandist., Montrose Co., Colorado, United States, Talnakh deposit, near Noril'sk, Russia, Dundas, Zeehan, Tasmania, Australia, Ciclova, Banat Mountains, Cara?-Severin County, Romania, Koashva Mt., Khibiny Massif, Kola Peninsula, Russia, and Tultui lazurite dep., Slyudyanka dist., South Baikal, Siberia, Russia.

Simplotite

#RS58597
Locality
Peanut mine, Uravandist., Montrose Co., Colorado, United States 
Formula
CaV4+4O9·5H2
Availability
Sold
Size
5 x 5.5 x 2.5 cm - Sm Cabinet 
Tagged
vanadium  
Special Info
Type Locality 

Black vitreous crystal grains to 1mm and stringers to 6mm in yellowish to dark brown sandstone matrix.


Simplotite

Formula
CaV4+4O9·5H2
Crystal System
Monoclinic 
Crystal Habit
Micaceous, Platy 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
greenish black, dark green, black 
Streak
brownish black 
Class
Monoclinic - Prismatic 
Hardness
Collection
RC Stamberg Collection
Special Info
Type Locality

Sperrylite

#58059
Locality
Talnakh deposit, near Noril'sk, Russia 
Formula
PtAs2 
Availability
Sold
Size
3 x 2 x 1.7 cm - Thumbnail 

Brilliant silvery cubic crystals of Sperrylite to 5mm. Excellent specimen.


Sperrylite

Formula
PtAs2 
Crystal System
Isometric 
Crystal Habit
Disseminated, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
tin white 
Streak
black 
Class
Isometric - Diploidal 
Fracture
Conchoidal 
Hardness
6-7 

Stichtite

#RS58588
Locality
Dundas, Zeehan, Tasmania, Australia 
Formula
Mg6Cr2CO3(OH)16·4H2
Availability
Available
Price
$50.00
Size
4 x 3 x 1.5 cm - Miniature 
Tagged
carbonate  

Rich purple soft mass of Stitchite formed by the alteration of serpentine rich in Chromite. It is often associated with Antigorite.


Stichtite

Formula
Mg6Cr2CO3(OH)16·4H2
Crystal System
Trigonal 
Crystal Habit
Encrustations, Nodular, Micaceous 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
lilac, light violet, pink 
Streak
pale violet blue 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
1.5-2 
Collection
RC Stamberg Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Stichtite
On Dakota Matrix
Other Available Stichtite
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Mindat
View Stichtite

Tetradymite

#RS58629
Locality
Ciclova, Banat Mountains, Cara?-Severin County, Romania 
Formula
Bi2Te2
Availability
Sold
Size
6.6 x 5.2 x 2.5 cm - Sm Cabinet 
Tagged
sulfide , tellurium  

Exceptionally rich specimen with silvery white, metallic masses of Tetradymite. 


Tetradymite

Formula
Bi2Te2
Crystal System
Trigonal 
Crystal Habit
Lamellar, Granular, Pseudo Hexagonal 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
steel gray, yellow gray 
Streak
steel gray 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
1.5-2 
Collection
RC Stamberg Collection

Villiaumite

with Pectolite - #57621
Locality
Koashva Mt., Khibiny Massif, Kola Peninsula, Russia 
Formula
NaF 
Availability
Sold
Size
6.5 x 5.2 x 4 cm - Sm Cabinet 

Deep red crystals to 1.5cm with Pectolite.


Villiaumite

Formula
NaF 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Granular 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, dark red, orange brown, pink 
Streak
pinkish white 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 

Vladimirivanovite

#57816
Locality
Tultui lazurite dep., Slyudyanka dist., South Baikal, Siberia, Russia 
Formula
Na6Ca2[Al6Si6O24](SO4,S3,S2,Cl)2·H2
Availability
Sold
Size
1.8 x 1.2 x 0.6 cm - Thumbnail 
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Author's Material 

Vladimirivanovite is the blue crystal grains and is a feldspathoid (silica deficient) of the Sodalite group. It was recognized as a new mineral in 2011 and so far been found in only two worldwide localities. The specimen is from the study material of Dr. Igor Pekov, who helped describe the mineral.


Vladimirivanovite

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

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