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ASBESTIFORM MINERALS

  
NEW ACQUISITIONS


A.

B.

C.

D.

E.

F.

G.

H.

I.

J.


CARLOSTURANITE
Val Varaita, near Sempeyre, Piedmont, Italy (type locale)
Carlosturanite is a fairly recently described member of the Amphibole group, first found at this locality in 1991.  Its habit is asbestiform, with flexible fibers found in some specimens up to several centimeters in length.  Color is light brown, with a vitreous luster.  Chemical composition is (Mg,Fe,Ti,Mn,Cr)21(Si,Al)12O28(OH)34.H2O.  

 

 

Type 1 – Aggregates of pure asbestiform / fibrous, light tan color Carlosturanite without matrix.

 

 

MI-1188
TYPE 1

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

1 A.

1 1/2

1/2

3/8

SOLD

 

1 B.

1 5/8

5/8

1/4

SOLD

 

1 C.

4 1/8

3/4

3/8

SOLD

 

1 D.

4 1/8

1

5/8

SOLD

 

1 E.

 Lot of long, hair-like fibers without matrix, in a plastic bag.  Fibers are up to 2”  long, @

SOLD



 

Type 2 – Same as above, aggregates of pure asbestiform / fibrous, light tan color Carlosturanite with rock matrix.  Due to the long, fibrous nature of this new mineral, matrix specimens are apparently more difficult to recover than examples without matrix.

 

 

MI-1188
TYPE 2

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

2 F.

1 3/8

5/8

5/8

SOLD

 

2 G.

1 1/2

7/8

3/8

$ 22.50

 

2 H.

1 3/4

1

3/8

SOLD

 

2 I.

1 7/8

1 3/4

1 1/4

SOLD

 

2 J.

2 1/2

2 1/8

1 3/8

$ 38.50

 

2 K.

2 5/8

2 3/8

1 1/2

$ 50.00

 

2 L.

4

2

1

SOLD

 

2 M.

3 3/4

2 5/8

1 3/8

$ 70.00




 


 

K.
L.
M.


1A.

1B.

2J

2K
2L

BALANGEROITE

San Vittore Mine, Balangero Serpentinite, Lanzo Valley, Piedmont, Italy (type locale)Balangeroite was first described from this locality in 1983 as aggregates of long, parallel to slightly divergent (fan-like), rich light tan to golden brown color asbestiform fibers.  Chemical composition is (Mg,Fe3+,Fe2+,Mn2+)42Si16O54(OH)40.

 

Type 1 – Aggregates of pure asbestiform / fibrous, light tan to golden brown color Balangeroite, without matrix.

 

 

MI-1189 Type 1

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

1 A.

1 3/4

1/2

1/4

$ 14.00

 

1 B.

1 7/8

7/8

5/8

SOLD

Type 2 – Same as above, with very small amounts of serpentine matrix.

 

 

MI-1189 Type 2

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

2 J.

1 7/8

3/4

1/2

$18.50

 

2 K.

6 1/4

1 3/4

up to 5/8”

SOLD

 

2 L.

6 1/2

2

up to 5/8”

SOLD

 


 


H.

I.
J.
K.
L.
MANGANOGRUNERITE (DANNEMORITE)
Brunsjogruvan (Brunsjo Mine), near Grythyttan, Orebro, Sweden
Manganogrunerite (formerly known as Dannemorite), a member of the amphibole group, was found at this locality as long fibrous, compact, asbestiform aggregates with a silky luster, and silvery-tan to silvery-gray color.  Chemical composition is Mn2Fe52+Si8O22(OH)2.
 

These matrix specimens are often associated with a small amount of massive black Magnetite. 
 

MI-1190

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

2 H.

1

5/8

5/8

$  5.00

2 I. 

3

1 1/2

1

$ 45.00

2 J.

2 7/8

1 3/4

1

$ 48.50

2 K.

3 1/4

1 3/8

1

$ 55.00

2 L.

4 1/4

1 1/4

5/8

$ 40.00

2 M.

3 1/2

1 1/4

3/4

SOLD

2 N.

3 1/2

1 1/2

5/8

$ 55.00

2 O.

5

1 7/8

1 3/4

$ 70.00

 
                       

 
  
 

M.
N.
O.


NOTES: 
All specimens are natural, not processed in any way from their original form. 
If you need other asbestiform minerals not described on this list please call, FAX, or email and send us your list of requirements. 

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