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Inclusions of hematite in feldspar (sunstone), India
Fire opal, Mexico
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Stress fissure («sun spangle») in baltic amber
Twin-crystal of chrysoberyl
Agate from Anzi, Maroc
Agate from Reichweiler, Germany
Structure in a healing fissure in topaz from Brazil

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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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© SGG/SSG 2026

 

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