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Schweizerische Gemmologische Gesellschaft
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Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusion of apatite in ruby from Tanzania
Colour zoning in ruby from Mong-Shu, Burma
Agate from Anzi, Maroc
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Bubbles and swirls in moldavite (natural glass)
Dumortierite in rock crystal, Brazil, polarised light

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  • Gemmology
    • Knowledge
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    • The 4 C's
    • Precious stones
    • Colours
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© SGG/SSG 2021

 

Our sponsors for 2021:

 
 
 
 
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