mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mixed Minerals

Friday, 01 November 2019 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including andalusite, aphrosiderite (chlorite group member), bournonite, brochantite, calcite and more from places like Lancaster, Worcester Co., Massachusetts, United States, Michigamme, Marquette Co., Michigan, United States, Herodsfoot mine, Liskeard, Cornwall, England, Paoli Copper Deposit, Garvin Co., Oklahoma, United States, Camp Bird mine, Ouray Co., Colorado, United States, and Santa Eulalia, Chihuahua, Mexico.

SOLD
Andalusite - AH51567
Andalusite - AH51567

Andalusite

var. chiastolite - #AH51567
Locality
Lancaster, Worcester Co., Massachusetts, United States 
Formula
Al2OSiO4 
Availability
Sold
Size
10 x 6 x 3.5 cm - Cabinet 

Chiastolite is a variety of Andalusite containg graphite inclusions giving it the cross patterns. As the Andalusite forms during metamorphism, the graphite aligns in cross-shaped patterns. Indeed this specimen consist of mostly graphitic schist.

This specimen was aquired by Hampson in 1944. The cross-sections are polished cuts in the andalusite to expose the crystals. 


Andalusite

Formula
Al2OSiO4 
Crystal System
Orthorhombic 
Crystal Habit
Blocky, Prismatic, Euhedral Crystals 
Cleavage
Distinct, Indistinct, Poor 
Luster
Vitreous (Glassy) 
Color
dark green, gray, brown, red, green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Splintery 
Hardness
6.5-7 
Collection
Arnold G Hampson Collection

Aphrosiderite (Chlorite Group Member)

#AH51644
Locality
Michigamme, Marquette Co., Michigan, United States 
Formula
(Fe,Mg,Al)6(Si,Al)4O10(OH)8 
Availability
Available
Price
$65.00
Size
3 x 2 x 2 cm - Thumbnail 

Aphrosiderite is a replacement of Almadine garnet by chlorite. Aphrosiderite has been a discredited mineral. This is nearly a perfect crystal. 


Aphrosiderite (Chlorite Group Member)

Collection
Arnold G Hampson Collection

Bournonite

#51590
Locality
Herodsfoot mine, Liskeard, Cornwall, England 
Formula
CuPbSbS3 
Availability
Available
Price
$45.00
Size
6 x 6.5 x 4.5 cm - Sm Cabinet 
Tagged
sulfide , copper  

2-3mm twinned crystals to Bournonite in open-fracture lined with drusy Quartz. Some nice iridescence with unknown brown plates. Handsome specimen from this classic English locality know for its superb Bournonite specimens. First worked in the 1700'3 and mid 1800's.


Bournonite

Formula
CuPbSbS3 
Crystal System
Orthorhombic 
Crystal Habit
Platy, Pseudo Cubic, Cog-wheel 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
gray, black, steel gray 
Streak
gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness

Brochantite

#AH51542
Locality
Paoli Copper Deposit, Garvin Co., Oklahoma, United States 
Formula
Cu4SO4(OH)6 
Availability
Sold
Size
6.5 x 4.5 x 2 cm - Sm Cabinet 
Tagged
copper  

Green micro crystals of Brochantite.


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 Quartz - #AH51578
Locality
Camp Bird mine, Ouray Co., Colorado, United States 
Formula
CaCO3 
Availability
Sold
Size
5.5 x 5 x 3.5 cm - Sm Cabinet 
Tagged
carbonate  

Distinct white Calcite crystals frosted by micro drusy Quartz. Nice specimen from this well-known Colorado favorite.


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
View Calcite
On Dakota Matrix
Previously Sold Calcite
On Dakota Matrix
Other Available Calcite
WebMineral
View Calcite
Mindat
View Calcite

Calcite

with Pyrite - #AH51605
Locality
Santa Eulalia, Chihuahua, Mexico 
Formula
CaCO3 
Availability
Sold
Size
8.5 x 6 x 5 cm - Sm Cabinet 
Tagged
carbonate  

A showy specimen of brassy, mammilary Pyrite with numerous crystals of white Calcsite to 2cm. Sits well, displays well.


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
View Calcite
On Dakota Matrix
Previously Sold Calcite
On Dakota Matrix
Other Available Calcite
WebMineral
View Calcite
Mindat
View Calcite

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2019 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map