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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 kozyrevskite, lawsonite, leucophosphite, malachite, metacinnabar, and mimetite and more from places like Tolbachik Volcano, Kamchatka, Russia, Reed Station, Tiburon Peninsula, Marin Co., California, United States, Tip Top mine, Custer Co., South Dakota, United States, Tsumeb mine, Tsumeb, Namibia, Mount Diablo mine, Contra Costa Co., California, United States, and San Pedro Corralitos, Chihuahua, Mexico.

Kozyrevskite

#57790
Locality
Tolbachik Volcano, Kamchatka, Russia 
Formula
Cu4O(AsO4) 2 
Availability
Sold
Size
1.8 x 1.4 x 1.1 cm - Thumbnail 
Tagged
arsenate , copper  
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Author's Material 

Bright green platy crystals throughout matrix. Very rich.This is author's study material from Dr. Igor Pekov. Kozyrevskite is dimorphous with Ericlaxmanite.

The exact locality is: Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka, Russia


Kozyrevskite

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

Lawsonite

#RS58619
Locality
Reed Station, Tiburon Peninsula, Marin Co., California, United States 
Formula
CaAl2Si2O7(OH)2·H2
Availability
Sold
Size
2.5 x 2 x 2.5 cm - Thumbnail 
Special Info
Type Locality 

Glassy light blue blocky crystals to 5mm with a green mica.


Lawsonite

Formula
CaAl2Si2O7(OH)2·H2
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Tabular 
Cleavage
Perfect, Perfect, Poor 
Luster
Vitreous - Greasy 
Color
colorless, white, gray, blue, pinkish 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
7.5 
Collection
RC Stamberg Collection
Special Info
Type Locality
Mineralpedia
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Previously Sold Lawsonite
On Dakota Matrix
Other Available Lawsonite
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Leucophosphite

with Hureaulite & Rockbridgeite - #58591
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
KFe3+2(PO4)2(OH)·2H2
Availability
Sold
Size
5.5 x 4.2 x 2.8 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Glassy green masses of Leucophosphite replacing Triphylite and purple Leucophosphite crystals to 3mm. Also within the cavity are light pink, sharp crystals of Hureaulite to 5mm and 1-3mm acicular, black crystals of Rockbridgeite.


Leucophosphite

Formula
KFe3+2(PO4)2(OH)·2H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Dull 
Color
brown, brownish yellow, colorless, greenish, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3.5 

Malachite

#RS58620
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Cu2CO3(OH)2 
Availability
Available
Price
$85.00
Size
4.5 x 2.5 x 1.5 cm - Miniature 
Tagged
carbonate , copper  
Special Info
Antique Specimen 

Green Malachite from the collection of Herbert Maucher, the son of Wilhelm Maucher (1879 - 1930), the famed German mineral dealer. W. Maucher attended the Freiburg Mining Academy and the mineral Maucherite was named in his honor. More on Maucher can be read on the Mineralogical Label Archive


Malachite

Formula
Cu2CO3(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Stalactitic, Massive - Fibrous 
Cleavage
Perfect, Fair, None 
Luster
Vitreous - Silky 
Color
green, dark green, blackish green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
Collection
RC Stamberg Collection
Special Info
Antique Specimen
Mineralpedia
View Malachite
On Dakota Matrix
Previously Sold Malachite
On Dakota Matrix
Other Available Malachite
WebMineral
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Mindat
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Metacinnabar

#RS58633
Locality
Mount Diablo mine, Contra Costa Co., California, United States 
Formula
HgS 
Availability
Available
Price
$40.00
Size
3.2 x 2.3 x 1.5 cm - Miniature 
Tagged
sulfide  

Black to silvery crystalline mass.


Metacinnabar

Formula
HgS 
Crystal System
Isometric 
Crystal Habit
Granular, Encrustations 
Cleavage
None, None, None 
Luster
Metallic 
Color
black, gray black 
Streak
black 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
Collection
RC Stamberg Collection

Mimetite

#RS58589
Locality
San Pedro Corralitos, Chihuahua, Mexico 
Formula
Pb5(AsO4)3Cl 
Availability
Available
Price
$275.00
Size
6.2 x 4.3 x 2.3 cm - Sm Cabinet 
Tagged
arsenate  

Beautiful, choice, orange botryoidal crystal groups to 7mm.


Mimetite

Formula
Pb5(AsO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Reniform, Globular, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Adamantine - Resinous 
Color
white, yellow, orange, brown, red 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
RC Stamberg Collection
Mineralpedia
View Mimetite
On Dakota Matrix
Previously Sold Mimetite
On Dakota Matrix
Other Available Mimetite
WebMineral
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Mindat
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