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Mixed Minerals

Friday, 09 October 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including calaverite, calcite, chrysocolla, clinoclase, and clinotyrolite and more from places like Mogul of Prince Albert mine, Cripple Creek, Teller Co., Colorado, United States, Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria, Montreal mine, Iron Co., Wisconsin, United States, Inspiration mine, Globe-Miami dist., Gila Co., Arizona, United States, Majuba Hill mine, Pershing Co., Nevada, United States, and Lovelock mine, Churchill Co., Nevada, United States.

Calaverite

#53957
Locality
Mogul of Prince Albert mine, Cripple Creek, Teller Co., Colorado, United States 
Formula
AuTe2 
Availability
Sold
Size
5 x 3.5 x 3 cm - Miniature 
Tagged
tellurium , gold  

Calaverite crystals partially covered by an alteration. This mine is not reported to have tellurides at least on Mindat. It came out of the collection of Delbert Brown, a deceased geologist who was located in Custer, SD. Delbert spent a lot of time in Colorado collecing at some of the old mines. A typed label has "Mogul" of the Prince Albert mine. The research I have done did not uncover this exact locality, however there is a Prince Albert mine. Raman verified as Calaverite.


Calaverite

Formula
AuTe2 
Crystal System
Monoclinic 
Crystal Habit
Striated, Massive, Crystalline - Fine 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, yellowish white 
Streak
green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
2.5 

Calcite

with Chalcopyrite & Sphalerite - #BC52624
Locality
Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria 
Formula
CaCO3 
Availability
Sold
Size
7 x 5.5 x 5 cm - Sm Cabinet 
Tagged
carbonate  

Quite a combination piece with four minerals. Central are the waterclear needle Quartz crystals to 8mm lining the center. It is crowned with thick discoidal crystals of Calcite to 2.3cm, which are color-zoned at the center. The two sulfides presnet are golden Chalcopyrite and Sphalerite crystals at the core. It sits perfect for display. 


Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Barbara Cureton Collection
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Previously Sold Calcite
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Mindat
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Calcite

on Manganite - #BC52694
Locality
Montreal mine, Iron Co., Wisconsin, United States 
Formula
CaCO3 
Availability
Sold
Size
11 x 9 x 8 cm - Cabinet 
Tagged
carbonate  

A unique and beautiful specimen of pink Calcite on black Manganite. 


Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Barbara Cureton Collection
Mineralpedia
View Calcite
On Dakota Matrix
Previously Sold Calcite
On Dakota Matrix
Other Available Calcite
WebMineral
View Calcite
Mindat
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Chrysocolla

#BC52650
Locality
Inspiration mine, Globe-Miami dist., Gila Co., Arizona, United States 
Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Availability
Available
Price
$250.00
Size
15 x 11 x 6 cm - Cabinet 
Tagged
copper  

This is a large cabinet specimen of solid light to deep blue Chrysocolla. It is a stunning in-person and is translucent in places with a waxy to vitreous luster. It is a must have for anyone who wishes to obtain a large eye-catching centerpiece for the display case.


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
Barbara Cureton Collection

Clinoclase

#47738
Locality
Majuba Hill mine, Pershing Co., Nevada, United States 
Formula
Cu3AsO4(OH)3 
Availability
Sold
Size
7.5 x 6 x 3 cm - Sm Cabinet 
Tagged
arsenate , copper  

Clinoclase from Majuba is some of the best around. This specimen has good coverage of deep bluish green acicular crystals to 1mm.


Clinoclase

Formula
Cu3AsO4(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Crystals rare, typically needlelike, tabular, as rosettes and radial fibrous spherical aggregates, as crusts and coatings. 
Cleavage
perfect 
Luster
Vitreous, pearly on cleavages 
Color
Dark greenish blue to greenish black; in transmitted light, blue-green. 
Streak
Bluish green 
Geological Setting
A rare secondary mineral in the oxidized zone of some arsenic-rich hydrothermal base-metal deposits. 
Class
2/m - Prismatic 
Fracture
Uneven 
Hardness
2.5 - 3 

Clinotyrolite

with Azurite - #54214
Locality
Lovelock mine, Churchill Co., Nevada, United States 
Formula
Ca2Cu9(AsO4,SO4)4(OH,O)1010H2
Availability
Sold
Size
4 x 3.5 x 3.5 cm - Miniature 
Tagged
arsenate , copper  

Radial groups of greenish blue Clinotyrolite to 6mm sometimes with Azurite centers.


Clinotyrolite

Formula
Ca2Cu9[(As,S)O4]4(OH)10*10(H2O) 
Crystal System
Monoclinic 
Crystal Habit
Radial, Foliated 
Luster
Silky - Pearly 
Color
emerald green 
Streak
light green 
Class
Monoclinic - Prismatic 
Hardness

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