Agate from Anzi, Maroc
Inclusions of hematite in feldspar (sunstone), India
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Spinel crystal in dolomite marble, Burma

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Conférence nationale 2024: Hotel- und Conference Center Sempachersee, Nottwil
09.06. - 11.06.2024

Hotel Sempachersee