Spinel crystal in dolomite marble, Burma
Fire opal, Mexico
Bubbles and swirls in moldavite (natural glass)
Colour zoning in ruby from Mong-Shu, Burma
Structure in a healing fissure in topaz from Brazil
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
«Red fox agate» from Patagonia, Argentina
Natural etching structure on a crystal face of diamond (trigons), polarised light

Attualita’

Conferenza nazionale 2025:

15.06. - 17.06.2024

Seehotel Wilerbad, Wilen am Sarnersee

Il modulo di iscrizione e il programma saranno pubblicati qui nella primavera del 2025 e inviati ai soci via e-mail.

Hotel Sempachersee