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Howlite

Chemical Composition : Ca2B5SiO9(OH)5

Hardness : 3.5

Specific Gravity (Density) : 2.53 – 2.59 (g/cm3)

Refractive Index : 1.58 – 1.60 Biaxial ( – )

In many cases, if the truth were known, Howlite would be better known as a Turquoise immitation. Howlite is frequently (and very convincingly) dyed blue to pass as Turquoise. It even contains gray to black threadlike impurities resembling the veining in Turquoise.

A current source of crystals is Cape Breton Island, Victoria County, Nova Scotia, Canada although these crystals are not suitable for faceting. The massive type can be found at the Sterling Borax Mine, Tick Canyon, Lang, Los Angeles County, California, USA (and a few other California locations); Magdalena, Sonora, Mexico; Susurluk, Turkey; Baljevac na Ibru, near Kraljevo, and near Bela Stena, Yugoslavia.

Howlite

Howlite Gemstone 14.21ct United States

10.43$
SKU: AK03499
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Rectangle

Weight

10 – 14.99 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 21.97ct United States

16.13$
SKU: AK03498
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Rectangle

Weight

Above 20 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 16.46ct United States

12.08$
SKU: AK03497
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Pear

Weight

15 – 19.99 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 25.86ct United States

18.98$
SKU: AK03496
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Pear

Weight

Above 20 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 17.73ct United States

13.01$
SKU: AK03495
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Oval

Weight

15 – 19.99 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 18.99ct United States

13.94$
SKU: AK03494
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Oval

Weight

15 – 19.99 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 19.60ct United States

14.39$
SKU: AK03493
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Oval

Weight

Above 20 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 20.96ct United States

15.38$
SKU: AK03492
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Fancy

Weight

Above 20 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite Gemstone 31.52ct United States

23.14$
SKU: AK03491
Colours

All Colours, Grey, White

Origin

All Origins, United States

Shapes

All Shapes, Oval

Weight

Above 20 ct, All Weight

Gem Type

All Cut Gems, Cabochons

Howlite

Chemical Composition : Ca2B5SiO9(OH)5

Hardness : 3.5

Specific Gravity (Density) : 2.53 – 2.59 (g/cm3)

Refractive Index : 1.58 – 1.60 Biaxial ( – )

In many cases, if the truth were known, Howlite would be better known as a Turquoise immitation. Howlite is frequently (and very convincingly) dyed blue to pass as Turquoise. It even contains gray to black threadlike impurities resembling the veining in Turquoise.

A current source of crystals is Cape Breton Island, Victoria County, Nova Scotia, Canada although these crystals are not suitable for faceting. The massive type can be found at the Sterling Borax Mine, Tick Canyon, Lang, Los Angeles County, California, USA (and a few other California locations); Magdalena, Sonora, Mexico; Susurluk, Turkey; Baljevac na Ibru, near Kraljevo, and near Bela Stena, Yugoslavia.

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