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Goshenite

Big Photo

Mogok Township, Pyin-Oo-Lwin District, Mandalay Region, Myanmar
20.76 carats
© Palagems

Colorless beryl, named after locality in Goshen, Massachusetts (USA). Used as imitation for diamond and emerald by applying silver or green metal foil to the cut stone.
The gem value of goshenite is relatively low.
3 photos

Goshenite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 

Goshenite Gemstones by Size

This table shows distribution of Goshenite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:4.28 cts
Heaviest:20.76 cts
Average:9.91 cts
Total photos:3
Do you have a larger Goshenite? Why not upload a photo?
4.28ct to 5.93ct5.93ct to 7.58ct7.58ct to 9.22ct9.22ct to 10.87ct10.87ct to 12.52ct12.52ct to 14.17ct14.17ct to 15.82ct15.82ct to 17.46ct17.46ct to 19.11ct19.11ct to 20.76ct
General Information
A variety or type of:Beryl
Chemical Formula
Be
 
3
Al
 
2
Si
 
6
O
 
18
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Goshenite Treatments
Goshenite can be colored yellow, green, pink, blue and in intermediate colors by irradiating it with high-energy particles. The resulting color depends on the content of Ca, Sc, Ti, V, Fe, and Co impurities. - Ibragimova, E. M. et al.(2009). "Correlations between admixtures and color centers created upon irradiation of natural beryl crystals".
Physical Properties of Goshenite
Mohs Hardness7.5 to 8
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity2.60 to 2.90
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityIndistinct
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Refractive Index1.562 to 1.615
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Optical CharacterUniaxial/-
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Birefringence0.003 to 0.010
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Dispersion
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