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ASBESTIFORM MINERALS

  
NEW ACQUISITIONS


A.

B.

C.

D.

ORTHOCHRYSOTILE
Calaveras Asbestos Mine, near Copperopolis, Calaveras County, California
Cross-fiber veinlets composed of silky luster, “very hairy”, light green Orthochrysotile are cutting through massive, dark green Serpentine matrix.








 


MI-1223

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

A.

3 1/4

1 7/8

2

SOLD

B.

3 3/8

2 3/4

2

SOLD

C.

3 3/4

2 1/4

2

SOLD

D.

4 7/8

2 5/8

3

SOLD

E.

 Lot of 4.0 grams, many small specimens with cross-fiber veinlets to 3/8” thick, some with minor matrix.

$   9.00
/ lot








 

2477

2478

2479
2480

CHAROITE TYPE 1
Vostochnyi area, Sirenevyi Kamen' Deposit, Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Sakha Republic, Eastern-Siberian Region, Russia

Charoite was first described from the Chara and Tokko Rivers area as a new mineral in 1978.  For many years the collecting sites were controlled by the Russian government and Charoite could not be exported, except as lapidary items (not as uncut, natural specimens).  Over the years, the government has relaxed their restriction and it is now possible to obtain natural Charoite specimens.  Both types are offered below.  Charoite is very pale lilac to light, to medium violet-purple in color, with a compact-fibrous, to asbestiform structure.  Chemical composition is:
(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4·~3H2O

 In “Dana’s New Mineralogy”, 8th Edition, Gaines, et al, P. 1400, it is reported that Charoite “alters to ‘Charoite asbestos’, a white to cream colored felt-like mass, which differs in OH-content from Charoite”.  A thin layer of the white Charoite alteration can be seen on the exterior surfaces of some of the specimens illustrated here. All specimens have labels from the Fersman Mineralogical Museum in Moscow.

Type 1 – The Charoite specimens in this group are all in natural condition, without saw cuts.  Very small amounts of translucent-opaque white Microcline are present on some of the specimens as small “pods” included within the Charoite.  Pricing is relative to the size of the specimen, as well as according to the rarity and amount of the associated minerals found on the specimens.  In addition to the Microcline, other associated minerals identified in this group include:
A =      Aegirine (black prismatic to radial sprays)
T =      Tinaksite (light orange, fan-like sprays and masses)
F =       Fedorite (light tan, pearly luster, platy)
C =      Canasite (pale smoky gray, platy)
 

 ITEM
NO.

 SPECIMEN SIZE
(INCHES)

 ASSOCIATES
PRESENT

 SPECIMEN
PRICE

2477

1 3/4

1 5/8

1 1/2

---

$  25.00

2478

2 1/8

1 1/2

3/4

F A T

$  60.00

2479

1 3/8

1 1/8

1

C

SOLD

2480

2 1/8

2

1/2

T  A

$  55.00

2481

3 1/4

3 1/4

7/8

T  A

$  65.00

2482

3 1/2

1 3/8

3/8

A

$  34.50


2481

2482


2483
2484

2485

2486

CHAROITE TYPE 2
Vostochnyi area, Sirenevyi Kamen' Deposit, Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Sakha Republic, Eastern-Siberian Region, Russia

Charoite was first described from the Chara and Tokko Rivers area as a new mineral in 1978.  For many years the collecting sites were controlled by the Russian government and Charoite could not be exported, except as lapidary items (not as uncut, natural specimens).  Over the years, the government has relaxed their restriction and it is now possible to obtain natural Charoite specimens.  Both types are offered below.  Charoite is very pale lilac to light, to medium violet-purple in color, with a compact-fibrous, to asbestiform structure.  Chemical composition is:
(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4·~3H2O

In “Dana’s New Mineralogy”, 8th Edition, Gaines, et al, P. 1400, it is reported that Charoite “alters to ‘Charoite asbestos’, a white to cream colored felt-like mass, which differs in OH-content from Charoite”.  A thin layer of the white Charoite alteration can be seen on the exterior surfaces of some of the specimens illustrated here. All specimens have labels from the Fersman Mineralogical Museum in Moscow.

Type 2 – Cut and/or polished Charoite specimens.  Associates are the same as given above, under the Type 1 specimens.  Items 2483 and 2484 have been cut to expose the color and structure of the Charoite.  Items 2485 through 2488 have been both cut, and polished.  The gram weights on the specimens are given only as a measure of size.  Specimens are not priced by the gram.

 ITEM
NO.

 GRAM
WEIGHT

 SPECIMEN SIZE
(INCHES)

 ASSOCIATES
PRESENT

 SPECIMEN
PRICE

2483

6.65

1 1/2

3/4

1/4+

---

$  10.00

2484

34.50

2 1/2

7/8

1/2

---

$  28.50

2485

34.75

1 7/8

1 7/8

1/8+

A

$  30.00

2486

28.25

3 1/2

1 1/2

1/4

A

$  28.00

2487

47.05

3 5/8

2 1/8

1/4

T  A

$  44.50

2488

69.00

4 1/4

1 1/8

3/8

A

$  60.00

 


2487

2488


2489

2490

BALANGEROITE

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

Both specimens listed below are aggregates of pure asbestiform-fibrous, silky luster, golden brown color Balangeroite.  The color and luster of the specimens is actually much better than shown the attached photos.  Item 2489 has a very small amount of matrix, and item 2490 is pure Balangeroite without matrix.

 

ITEM   NO.

SPECIMEN SIZE(INCHES)

SPECIMEN
PRICE

 

2489

3 7/8

1 1/8

1/2

$   85.00

 

2490

4 1/2

7/8

3/8

SOLD


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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