Poudretteite

Formula: KNa₂B₃Si₁₂O₃₀
Mineral class: silicates
Crystal system: hexagonal
Mohs scale: 5
Density (g/cm³): 2.48 - 2.50
Refractive index: 1.510 - 1.532
Cleavage: -
Colors: colorless, rose, violet
Luster: vitreous
Fluorescence: -
Pleochroism: strong: colorless, light brown - purple-pink
Largest faceted Poudretteite: 9.41 ct?, from a 21.22 ct crystal
Deposits:
Poudrette Quarry / Mont Saint-Hilaire / Rouville County / Québec / Canada
Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing Distrikt / Mandalay / Myanmar
Discovery: around 1965
1st Description: 1987 (Dunn, Ercit, Grice, Van Velthuizen)
Name: in honor of the Poudrette family, operators of the famous quarry at Mont Saint-Hilaire / Rouville County / Québec / Canada

Poudretteite Mineral

Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Mandalay / Myanmar

Photo by kind permission of © www.caltech.edu/

Poudretteite

Size: 0.7 x 0.4 cm
Weight: 0.32 ct
Origin: Mogok / Mandalay / Myanmar

Photo by kind permission of © www.thegemtrader.com

Poudretteite Mineral

Size: 1.59 x 1.22 cm

Origin: Mogok / Mandalay / Myanmar

Photo by kind permission of © www.gps.caltech.edu

Poudretteite

Weight: 1.64 ct

Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

Photo by kind permission of © www.multicolour.com

Poudretteite Mineral

Weight: 39.93 ct
Size: 1.95 x 1.74 x 1.53 cm
Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

Photo by kind permission of © www.crystal-treasure.com

Poudretteite

Weight: 3.7 ct

Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

Photo by kind permission of © www.multicolour.com

Poudretteite Mineral

Size: 2.03 x 0.78 x 0.74 cm

Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

Photo by kind permission of © www.crystal-treasure.com

Poudretteite

Size: 1.19 x 1.01 x 0.67 cm
Weight: 5.05 ct
Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

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Poudretteite Mineral

Size: 1.25 x 0.84 x 0.60 cm
Weight: 3.10 ct
Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

Photo by kind permission of © www.crystal-treasure.com

Poudretteite

Size: 1.05 x 0.9 x 0.6 cm
Weight: 2.05 ct
Origin: Pyan Gyi Mine / Pyan Pyit / Mogok / Sagaing District / Mandalay / Myanmar

Photo by kind permission of © www.americanthai.com

Poudretteite

Weight: 6 ct

Origin: Mogok / Sagaing District / Mandalay / Myanmar

Photo: Kyaw Thu, by kind permission of © www.palagems.com