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MINERAL SPECIMENS FOR DISPLAY


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= Fluorescent Specimen
   =  Radioactive Specimen
 


2647

2648

2649

2650

2668

FORSTERITE (= Olivine, Peridot)
San Carlos Apache Indian Reservation, Gila County, Arizona

Two types are available from this locality –

Type 1 – Olivine volcanic “bombs”, that is, rounded masses that were recovered in the process of looking for gemstone material, with a very thin coating of black lava on the natural exterior surfaces.  Specimens available are sections of opened, Olivine filled volcanic “bombs”.

Type 2 - Pure, gemmy, light olive green color Olivine masses without matrix, presumably recovered from the Olivine volcanic “bombs” during the process of mining and collecting these for gemstones. 

 

 

 

ITEM
NO.

DESCRIPTION / TYPE

WEIGHT
(GRAMS)

SPECIMEN SIZE
(INCHES)

SPECIMEN  PRICE

 

2647

 1.  Olivine: Approx.   75% of a complete bomb.

200.00

2 1/4

2 1/8

1 1/4

$ 90.00

 

2648

 1.  Olivine:  Approx. 45% of a complete bomb.

207.20

2 3/8

2

1 1/2

$ 93.00

 

2649

 1.  Olivine: Approx. 40% of a complete bomb.

246.80

2 3/4

2

1 1/2

$110.00

 

2650

 2.  Olivine:   Pure, olive green masses.

4.75 (lot of 3 small specimens)

3/8 X 1/8”,
5/8 X 1/4”,
3/4 X 1/2 X 3/8”

$  30.00 /       lot of 3

 

2668

 2. Olivine:  Pure,  olive green masses.

4.35 (lot of 10 small specimens)

~ 5 to 12 mm

$ 25.00 / lot of 10

 


2651

2652A

2652B

2666

FORSTERITE  (= Olivine, Peridot)

Mt. Briancon, Saint-Arcons-d’Allier, Langeac, Haute-Loire, Auvergne, France

Two Olivine volcanic “bomb” specimens, that is, rounded volcanic masses, are available from this French locality, each with a very thin coating of black lava on the natural exterior surfaces.  The # 2651 specimen is a section of an opened, olive green color, Olivine filled volcanic “bomb”.  The # 2652 specimen is a complete “bomb” that has been split open to show the crystalline, olive green interior.  The # 2652A photo shows the two halves of the “bomb”, reassembled to show the exterior surface.  The # 2652B photo shows both halves of the opened “bomb”.

 

 

 

ITEM
NO.

DESCRIPTION / TYPE

WEIGHT
(GRAMS)

SPECIMEN SIZE
(INCHES)

SPECIMEN  PRICE

 

2651

 Olivine: Approx. 40% of a complete bomb.

103.10

2 1/8

1 5/8

1 1/4

$  45.00

 

2652

 Olivine:    100% --      A complete bomb, split in half.

241.10

2 5/8

2 1/2

1 1/8

$ 110.00





 

2666

Olivine: Approx. 40% of a complete bomb,  w/ black lava matrix.

181.75

2 7/8

2

1 3/8

$  65.00

 

 

FORSTERITE (= Olivine, Peridot)
Dreis Maar, Eifel, Rhineland-Palatinate, Germany

This specimen is a portion of a large mass of pure, olive green color Olivine without matrix or evidence of a natural exterior surface like the Olivine “bomb” specimens described above from Arizona or France.  This historical German collecting site is known for its volcanic Olivine specimens.  This must have been a portion of a very large “bomb”, as there is no lava present on either side of the specimen.

Specimen size:  3 1/8” X 2 5/8” across X 1 1/4” thick
Gram weight:  325.20 grams 
Item No.  2653
Price:  $ 95.00


2654

2655

2657

2667

FORSTERITE  (= Olivine, Peridot)
Cuervo Crater, Le Geria, Lanzarotte, Las Palmas Province, Canary Islands, Spain

Several specimens are available from this obscure volcanic locality, located off the coast of Spain in the Canary Islands.  Each has at least one surface showing the black lava coated exterior.

 

 

 

ITEM
NO.

DESCRIPTION / TYPE

WEIGHT
(GRAMS)

SPECIMEN SIZE
(INCHES)

SPECIMEN      PRICE

 

2654

Olivine: Approx. 40% of a complete, lava- coated bomb.

67.85

2

1 1/8

1

SOLD

 

2655

Olivine:  Section of a very large bomb with minor lava along one edge.

118.64

2

1 5/8

1

$  65.00

 

2656

Olivine:  Section of a very large bomb with minor lava along one edge.

212.60

2 1/4

1 3/4

1 12

$ 105.00

 

2657

Olivine: Approx. 25% of a very large, complete bomb with a  thin, black lava base.

212.90

2 1/4

2

2

$ 100.00

 

2667

Olivine:  Section of a very large bomb with minor lava along one edge.

195.00

3

2

1 1/8

$  95.00


2658

2659

FORSTERITE (= Olivine, Peridot) with MAGNETITE
Sapat Gali (Soppat), Khyber Pakhtunkhwa, Pakistan

Large, dodecahedral habit, black Magnetite crystals, with a slightly frosted luster, are associated with light olive green crystalline / crystallized Forsterite (Olivine).  No rock matrix. 

 

 

ITEM
NO.

DESCRIPTION / TYPE

SPECIMEN SIZE
(INCHES)

SPECIMEN      PRICE

 

2658

Olivine:  Crystalline and crystal sections with dodecahedral Magnetite xls.

1 3/8

1

7/8

$  45.00

 

2659

Olivine:  A single terminated Olivine xl.  + crystalline Olivine, with dodecahedral
Magnetite xls.

1 1/8

3/4

3/4

$  55.00


2453

2454

FORSTERITE  (= Olivine, Peridot)
Mount Shadwell Quarry, Mortlake, Moyne Shire, Victoria, Australia

Formed about 25,000 years ago, the Mount Shadwell volcano is believed to have last erupted about 5,000 years ago. The large ejected rocks thrown from this volcano are called volcanic bombs. They are sometimes egg or oval shaped because they were formed into oblong shapes as they were being hurtled through the air by the force of the volcanic eruption, before solidifying.  It would have been an amazing sight to witness the volcanic eruption that ejected these treasures – Olivine “bombs” filled with bright yellow-green, glassy, crystalline Olivine, also known as Peridot, or Forsterite.  Each of these “bombs” has been opened to reveal the yellow-green, glassy Olivine.  The exteriors of the specimens are coated with black-gray volcanic scoria, a form of lava with numerous tiny gas pockets incorporated.

 

 

ITEM
NO.

DESCRIPTION / TYPE

WEIGHT(GRAMS)

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

2453

Olivine: Approx. 40% of a complete, lava-  coated bomb. Olivine is exposed on the back of the specimen.

168.75

2 5/8

1 7/8

1 1/2

$  75.00

 

2454

Olivine: Approx. 40% of a complete, lava- coated bomb.  Back of the specimen is coated with lava.

223.00

2 1/2

2 1/4

1 3/4

$ 100.00

 


2660

2661

2662

2663

2664

FORSTERITE
Zone 6, Jacupiranga Mine, Sao Paulo State, Brazil

This locality for crystallized Forsterite is described in the “Mineralogical Record” magazine, Sept-Oct 1984, P. 261-270.  The occurrence of light smoky gray color Forsterite crystals from Zone 6 was described on P. 265 by Luiz Menezes, one of the authors of the article, who personally collected and supplied the specimens listed here circa 1986.  Item 2660 is light colored Forsterite crystal group with two micro Magnetite octahedrons associated.  Items 2661 through 2665 have white Apatite (Fluorapatite ?) matrix. Due to the friable nature of the white Apatite matrix, only small specimens are available. The Forsterite crystals from the Zone 6 occurrence are typically only up to 6 mm in length.  The gram weights are given strictly as a measure of overall specimen size.  Specimens are not priced by the gram. 

 

 

ITEM
NO.

WEIGHT(GRAMS)

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

2660

.85

3/8

1/4

1/4

$ 14.00

 

2661

5.60

7/8

5/8

1/2

$ 22.00

 

2662

2.82

3/4

1/2

3/8

$ 16.00

 

2663

4.10

7/8

5/8

1/4

$ 20.00

 

2664

4.45

3/4

1/2

1/2

$ 18.00

 

2665

1.75 gr
/ lot in a gelatin capsule

Lot of 15+ individual, single & dbl. term. crystals of 1 to 3  mm size + several small matrix specimens,  up to 5 mm.

$20.00 / lot

 

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