Bowenite

Bowenite has a light to dark apple green colour, often mottled with cloudy white patches and darker veining.

It is an especially hard Serpentine with Moh's hardness 5.5 and it is most frequently used in carving and jewellery.

Bowenite is sometimes used as a substitute of jade.

Bowenite found in South Korea has uniform semi-transparent deep green colour with numerous fine, opaque black magnetite inclusions. It is also known as Booyo precious serpentine.
General Information
A variety or type of:Antigorite, which is a variety of Serpentine
Chemical Formula
(Mg,Fe
2+
 
)
 
3
Si
 
2
O
 
5
(OH)
 
4
Anthony et al, Handbook of mineralogy (2001)
Photos of natural/un-cut material from mindat.org
Bowenite Treatments
May be dyed: acetone test. Dyed intense green - chelsea: reddish - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 6
Physical Properties of Bowenite
Mohs Hardness5 to 5.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity2.58 to 2.80
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
TenacitySectile
Gemdat.org, Management Team (2012)
Cleavage QualityPerfect
Gemdat.org, Management Team (2012)
FractureUneven,Irregular,Splintery
Gemdat.org, Management Team (2012)
Optical Properties of Bowenite
Refractive Index1.530 to 1.575
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Colour
Colour (General)Oily green to bluish green. Common whitish cloudy patches
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
TransparencyTranslucent
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
LustreWaxy,Silky,Resinous,Greasy,Dull (Earthy)
Gemdat.org, Management Team (2012)
Crystallography of Bowenite
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Inclusions in Bowenite
May show typical greenish sparkling inclusions (chlorite) - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 6
Further Information
Mineral information:Bowenite information at mindat.org
Significant Gem Localities
North Korea
 
  • South Hwanghae Province
South Korea
 
  • South Chungcheong Province
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