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0 item @ $0.00  

Mixed Minerals

Sunday, 11 July 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including chalcopyrite, microcline, and quartz and more from places like Cuartociengas, Coahuilla, Mexico, Organ dist., Dona Ana Co., New Mexico, United States, and Gravel Hill mine, Perranzabuloe, Cornwall, England.

Chalcopyrite

on Quartz - #52658
Locality
Cuartociengas, Coahuilla, Mexico 
Formula
Cu1+Fe3+S2 
Availability
Available
Price
$125.00
Size
7 x 3 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper  

Nice piece of Quartz totally coated with Chalcopyrite.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 
Collection
Barbara Cureton Collection

Microcline

#52590
Locality
Organ dist., Dona Ana Co., New Mexico, United States 
Formula
KAlSi3O8 
Availability
Available
Price
$300.00
Size
8 x 5 x 6 cm - Sm Cabinet 
Tagged
pegmatite mineral  

I'm not sure what to make of this piece, simply it is set of light pink Microcline twinned crystals.


Microcline

Formula
KAlSi3O8 
Crystal System
Triclinic 
Crystal Habit
Blocky, Crystalline - Coarse, Prismatic 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
bluish green, green, gray, grayish yellow, yellowish 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
Collection
Barbara Cureton Collection

Quartz

ps after Baryte - #54518
Locality
Gravel Hill mine, Perranzabuloe, Cornwall, England 
Formula
SiO2 
Availability
Sold
Size
6 x 4 x 4 cm - Sm Cabinet 

An interesting specimen of former Baryte crystals from 1 to 6mm now replaced by Quartz.


Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness
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