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Mixed Minerals

Friday, 25 September 2020 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including adamite, austinite, brochantite, calcite, galena, and genthelvite and more from places like Mina Ojuela, Mapimi, Durango, Mexico, Titusville mine, Animas dist., San Juan Co., Colorado, United States, Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria, Julia Fisk mine, Leadville dist., Lake Co., Colorado, United States, and Mont Saint-Hilaire, Rouville Co., Quebec, Canada.

Adamite

(cuprian) - #AH54181
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Zn2AsO4(OH) 
Availability
Sold
Size
9 x 4 x 4 cm - Sm Cabinet 
Tagged
arsenate  

Tiny 1mm and less green cuprian Adamite.


Adamite

Formula
Zn2AsO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Druse, Encrustations 
Cleavage
One Good 
Luster
Vitreous - Resinous 
Color
yellow, green, violet, pink, yellowish green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
Collection
Arnold G Hampson Collection
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Austinite

(cuprian) with Calcite - #AH54183
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
CaZnAsO4(OH) 
Availability
Sold
Size
7 x 4 x 3.5 cm - Sm Cabinet 
Tagged
arsenate  

Calcite with included Austinite (I think). I have not seen this combination and cannot testify to the identity. Clearly the rhombic crystals are Calcite. But the green is up to speculation as this could also be Conichalcite.


Austinite

Formula
CaZnAsO4(OH) 
Crystal System
Orthorhombic 
Cleavage
Good, None, None 
Luster
Subadamantine 
Color
brown, colorless, green, yellowish white, white 
Streak
white 
Class
Orthorhombic - Disphenoidal 
Fracture
Brittle - Uneven 
Hardness
4-4.5 
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Austinite
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Mindat
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Brochantite

with Serpierite and Galena - #AH54174
Locality
Titusville mine, Animas dist., San Juan Co., Colorado, United States 
Formula
Cu4SO4(OH)6 
Availability
Sold
Size
5 x 4 x 4 cm - Miniature 
Tagged
copper  

A good representative and study specimen from this locality with decayed pods of former Chalcopyrite(?) and/or Galena and redeposited Copper minerals of Brochantite and Serpierite. 


Brochantite

Formula
Cu4SO4(OH)6 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Prismatic, Druse 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
green, emerald green, black 
Streak
pale green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Arnold G Hampson Collection

Calcite

with Calcite - #AH54011
Locality
Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria 
Formula
CaCO3 
Availability
Available
Price
$45.00
Size
10 x 8 x 4 cm - Cabinet 
Tagged
carbonate  

Creamy coated Calcite crystals to 2.2cm overgrown on colorless Calcite. 


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
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Calcite
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Galena

with Chalcopyrite & Quartz - #AH54178
Locality
Julia Fisk mine, Leadville dist., Lake Co., Colorado, United States 
Formula
PbS 
Availability
Sold
Size
7.5 x 6 x 2 cm - Sm Cabinet 
Tagged
sulfide  

Neat piece with "blebs" of Galena crystals and golden Chalcopyrite all on a bed of Rhodochrosite with Quartz.


Galena

Formula
PbS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Massive - Granular, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Metallic 
Color
light lead gray, dark lead gray 
Streak
grayish black 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Galena
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Genthelvite

with Calcioburbankite - #54170
Locality
Mont Saint-Hilaire, Rouville Co., Quebec, Canada 
Formula
Be3Zn4(SiO4)3
Availability
Sold
Size
5 x 3 x 2 cm - Miniature 
Tagged
beryllium  

White crystals of Henthelvite to 1mm with at least two colorless, prismatic crystals of Calcioburbankite to 3mm. Nice piece with several other minerals included.


Genthelvite

Formula
Be3Zn4(SiO4)3
Crystal System
Isometric 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
blue green, brown, colorless, green, yellow 
Streak
white 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Uneven 
Hardness
6-6.5 
Collection
Bill McConlogue Collection

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