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Celestine (also called Celestite)
Current inventory:  1 gem
 

Celestite

  
Celestine is named from the Latin coelestis meaning celestial refering to the beautiful pale blue color of some specimens.

Discovered in 1791;   IMA status:  Valid (pre-IMA; Grandfathered)

 

Chemistry

 

 

Chemical Formula:

SrSO4

 

Strontium Sulfate

Molecular Weight:

183.68 gm

Composition:

Stontium

47.70 %

Sr

56.41 %

SrO

 

Sulfur

17.46 %

S

43.59 %

SO3

 

Oxygen

34.84 %

O

 

 

 

 

100.00 %

 

100.00 %

= TOTAL OXIDE

 

 

Classification

   

   

Mineral Classification:

Sulfates

Strunz 8th Ed. ID:

6/A.09-10

Nickel-Strunz 10th Ed. ID:

7.DG.15

 

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H
2O
D : With only large cations

Related to:

Baryte Group. Baryte-Celestine Series. The strontium analogue of Baryte.

Members of Group:

Baryte Group: Anglesite, Baryte, Celestine, Hashemite.

Varieties:

Barian Celestine, Barytosulfate of Strontian, Calciocelestine

Synonyms:

Celestite, Coelestine, Eschwegite (of LÚvy), Sicilianite

 

 

Crystal Data

   

   

Crystallography:

Orthorhombic - Dipyramidal

Crystal Habit:

Well-formed crystals common, typically thin to thick tabular and elongated yielding lath-like forms; or elongated to 45 cm with equant cross section; also pyramidal, commonly striated. Fibrous veinlets or nodules with parallel or radiated fiber structure; massive granular; lamellar, earthy, rare.

Twinning:

Reported on {210}, {101} and other planes.

 

 

Physical Properties

   

 

Cleavage:

Perfect on {001} and {210}, Poor on {010}

Fracture:

Irregular to Uneven

Tenacity:

Brittle

Moh's Hardness:

3.0 - 3.5

Density:

3.96 - 3.98 (g/cm3)

Luminescence:

May be Fluorescent. Yellow, Bluish White under SW UV and LW UV

Radioactivity:

Not Radioactive

Other:

Very slightly soluble in water. Slowly soluble in hot concentrated acids or alkali carbonate solutions.

 

 

Optical Properties

   

   

Color:

Colorless, shades of Light Blue, White, Reddish, Greenish, Brownish, Greyish

Transparency:

Transparent to Translucent

Luster:

Vitreous to Pearly

Refractive Index:

1.619 - 1.632  Biaxial ( + )

Birefringence:

0.009 - 0.010

Dispersion:

0.014; Moderate; r < v

Pleochroism:

Weak; Blue colored material: shades of Indigo and Lavender-Blue, Bluish Green or Violet

 

 

Occurances

   

   

Geological Setting:

Occurs mainly in sedimentary rocks such as bedded deposits of gypsum and halite; also in bedded limestone and dolomite, in cavities.

Common Associations:

Analcime, Anhydrite, Calcite, Celadonite (mafic volcanoclastics), Dolomite, Fluorite (cavities in carbonate rocks), Gypsum, Natrolite, Hydroxyapophyllite, Strontianite, Sulfur (bedded evaporites)

Common Impurities:

None

Type Locality:

Bell's Mill, Bellwood, Blair County, Pennsylvania, USA

Year Discovered:

1791

View mineral photos:

Celestine Mineral Photos and Locations

 

 

More Information

   

   

 

Mindat.org
Webmineral.com

 

 


Celestine (also called Celestite) is a rare collector's gem that is found as colorless, pale blue or rarely orange. It is a soft and fragile gem that is very difficult to cut and not recommended for jewelry. Celestine is a unusual Strontium and Sulfur mineral that is a member of the Barite mineral group that also includes Anglesite and Barite. Celestine (SrSO4) is the strontium analog of Barite (BaSO4). Celestine contains strontium (Sr) in place of Barite's barium (Ba). Both have the same structure and can form very similar crystals.

Current sources are Rochefort, Namur Province, Belgium; Sakoany Mine, Sofia Region, Mahajanga Province, Madagascar; Chihuahua, Mexico; Hunan Province, China; Andalusia, Spain; and in the USA at Maybee, Michigan; Chittenango Falls, New York; Clay Center, Ohio.
 

  
Celestine gems for sale:

Celestine-003

Gem:

Celestine

Stock #:

CELES-003

Weight:

0.9180 ct

Size:

6.46 x 4.50 x 3.12 mm

Shape:

Cushion

Color:

Colorless

Clarity:

SI2

Origin:

Hunan Province, China

Treatment:

None (natural)

Price:

$38.00    [ Make an offer ]

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Celestine-003

A rare gem from China.


Celestite-002

Gem:

Celestine

Stock #:

CELES-002

Weight:

0.7685 ct

Size:

7.05 x 5.04 x 2.84 mm

Shape:

Oval

Color:

Blue

Clarity:

SI2 - I2

Origin:

Chittenango Falls, New York, USA

Treatment:

None (natural)

Price:

SOLD (but we have others)

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Celestite-002

A very rare gem from Chittenango Falls, Fenner Township, Madison County, New York, USA. This gems is somewhat included, but very clean for a gem from this location and shows very well with good color.


Celestite-001

Gem:

Celestine

Stock #:

CELES-001

Weight:

2.1085 ct

Size:

9.20 x 4.84 x 4.45 mm

Shape:

Cut Corner Rectangle, Step

Color:

Very Pale Blue

Clarity:

Eye Clean

Origin:

Mahajanga Province, Madagascar

Treatment:

None (natural)

Price:

SOLD (but we have others)

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Celestite-001

A very rare gem from Sakoany Mine, Sofia Region, Mahajanga (Majunga) Province, Madagascar. This beautiful gem was precision faceted in the US.


 


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