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Two-phase inclusions in tourmaline from Namibia
Twin-crystal of chrysoberyl
Two-phase inclusion in amethyst, Brazil
Two-phase inclusions in sapphire, Sri Lanka
Inclusions of hematite in aquamarine, Tanzania
Agate from Anzi, Maroc
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

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Save the date: SGS Central Conference 2027:

24-25 May 2027
Villars-sur-Ollon (1884)

Seehotel Wilerbad, Wilen am Sarnersee
 
 
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