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Poudretteite
Current inventory:  3 gems
 

Poudretteite

Chemistry:  KNa2B3SI12O30

Discovered in 1987;   IMA status: Approved 1987
The name Poudretteite is from its discovery location at the Poudrette quarry, Mont Sainte-Hilaire, Quebec, Canada. The quarry is operated by the Poudrette family.

 

Classification

   

   

Mineral Classification:

Silicates

Strunz 8th Ed. ID:

8/E.22-10

 

8 : Silicates
E : Cyclosilicates, triplet rings [Si3O9]6-
22 : Milarite - Osumilite series

 

 

Crystal Data

   

   

Crystallography:

Hexagonal - Dihexagonal Dipyramidal

Crystal Habit:

As roughly equant, barrel-shaped prismatic crystals, deeply etched, to 5 mm.

 

 

Physical Properties

   

 

Cleavage:

None

Fracture:

Splintery to Conchoidal

Tenacity:

Brittle

Moh's Hardness:

5.0 - 6.0

Density:

2.51 (g/cm3)

Radioactivity:

Barely Detectable, GRapi = 61.48 (Gamma Ray American Petroleum Institute Units)

 

 

Optical Properties

   

   

Color:

Colorless to pale Pink

Transparency:

Transparent

Luster:

Vitreous

Refractive Index:

1.516 - 1.532  Uniaxial ( + )

Birefringence:

0.0160 - 0.0210

Dispersion:

n/a

Pleochroism:

n/a

 

 

Occurances

   

   

Geological Setting:

In marble xenoliths within nepheline syenite breccias in an intrusive alkalic gabbro-syenite complex.

Type Locality:

Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada

Year Discovered:

1987

 

 

More Information

   

   

 

Mindat.org
Webmineral.com

 

 


Poudretteite is one of the rarest gems on Earth. It was discovered in Poudrette quarry, Mont Sainte-Hilaire, Quebec, Canada in 1987 and more recently in 2000 in the Mogok Valley in upper Myanmar (Burma). Until the recent find in Mogok, only very tiny crystals were found at Mont Sainte-Hilaire, not large enough to be faceted. The first Mogok find has resulted in less than a dozen faceted gems. A pale pink and colorless crystal was found that was originally identified as Scapolite. Poudretteite is found as colorless, very pale pink, pink and purple.
 

  
Poudretteite gems for sale:

Poudretteite-001

Gem:

Poudretteite

Stock #:

POUD-001

Weight:

0.0050 ct

Size:

1.60 x 0.78 mm

Shape:

Round

Color:

Very Pale Pink

Clarity:

Eye clean

Origin:

Mogok, Myanmar (Burma)

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.

Poudretteite-001

This extemely rare gem is from a recent find in Mogok, Burma. Poudretteite is considered to be one of the ten rarest gemstones in the world according to curiousnotions.com.


Poudretteite-002

Gem:

Poudretteite

Stock #:

POUD-002

Weight:

0.0715 ct

Size:

4.18 x 2.21 x 1.62 mm

Shape:

Marquise

Color:

Colorless

Clarity:

Eye clean

Origin:

Mogok, Myanmar (Burma)

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.

Poudretteite-002

This extemely rare gem is from a recent find in Mogok, Burma. Poudretteite is considered to be one of the ten rarest gemstones in the world according to curiousnotions.com.


Poudretteite-003

Gem:

Poudretteite

Stock #:

POUD-003

Weight:

0.0670 ct

Size:

4.69 x 2.07 x 1.41 mm

Shape:

Marquise

Color:

Light Pink

Clarity:

Eye clean

Origin:

Mogok, Myanmar (Burma)

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.

Poudretteite-003

This extemely rare gem is from a recent find in Mogok, Burma. Poudretteite is considered to be one of the ten rarest gemstones in the world according to curiousnotions.com.


Poudretteite-004

Gem:

Poudretteite

Stock #:

POUD-004

Weight:

0.0300 ct

Size:

2.01 x 1.99 x 1.27 mm

Shape:

Square

Color:

Very Pale Pink, Colorless

Clarity:

Eye clean

Origin:

Mogok, Myanmar (Burma)

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.

Poudretteite-004

This extemely rare gem is from a recent find in Mogok, Burma. Poudretteite is considered to be one of the ten rarest gemstones in the world according to curiousnotions.com.


 


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