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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 aphrosiderite (chlorite group member), bournonite, corundum, grossular, heulandite, and kyanite and more from places like Michigamme, Marquette Co., Michigan, United States, Herodsfoot mine, Liskeard, Cornwall, England, Highlands, North Carolina, United States, Orford Nickel mine, Estrie, Quebec, Canada, Cape d'Or, Nova Scotia, Canada, and Sponda Alp, Chironico Valley, Leventina, Ticino, Switzerland.

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

Corundum

#AH51547
Locality
Highlands, North Carolina, United States 
Formula
Al2O3 
Availability
Available
Price
$30.00
Size
5 x 5 x 3.5 cm - Miniature 

Red crude Corundum wrapped with Muscovite. The locality I assume is the nearest town, and thus I do not know precisely the locality. It is not quite this red in hand. Acquired by Hampson in 1945. Perhaps somebody out there knows?


Corundum

Formula
Al2O3 
Crystal System
Trigonal 
Crystal Habit
Euhedral Crystals, Tabular, Prismatic 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
blue, red, yellow, brown, gray 
Streak
none 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Tough 
Hardness
Collection
Arnold G Hampson Collection
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Grossular

(chromian) - #AH51610
Locality
Orford Nickel mine, Estrie, Quebec, Canada 
Formula
Ca3Al2(SiO4)3 
Availability
Available
Price
$40.00
Size
5.5 x 4 x 3 cm - Sm Cabinet 

Micro crystals of green Grossular, chromium rich. There are no real good crystals, but some faces can be seen under the scope.


Grossular

Collection
Arnold G Hampson Collection

Heulandite

#PD51642
Locality
Cape d'Or, Nova Scotia, Canada 
Formula
NaCa4(Si27Al9)O72ยท24H2
Availability
Available
Price
$75.00
Size
8 x 8 x 7.5 cm - Sm Cabinet 

White, very lustrous 2.5cm excellent crystal perched and exposed nicely in matrix. This is a highly desirable locality for zeolite.


Heulandite

Collection
Don Phillips Collection

Kyanite

in mica schist - #AH51565
Locality
Sponda Alp, Chironico Valley, Leventina, Ticino, Switzerland 
Formula
Al2OSiO4 
Availability
Available
Price
$75.00
Size
18 x 11 x 3 cm - Cabinet 

Large cabinet specimen of blue Kyanite blades to 8cm long in Pyrophyllite (?) matrix or "mica schist". This is a classic well-know locality which is often featured in many older mineral/geology picture books.


Kyanite

Formula
Al2OSiO4 
Crystal System
Triclinic 
Crystal Habit
Columnar, Fibrous 
Cleavage
Perfect, Imperfect, None 
Luster
Vitreous - Pearly 
Color
blue, white, gray, green, black 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle 
Hardness
4-7 
Collection
Arnold G Hampson Collection
Mineralpedia
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