The World of Opals

Online lesson: What are opals. Basic mineralogical classification. Opal gem varieties and trade terminology. History and main occurrences. The complexity of understanding opal value factors. Main treatments and imitations. 

June 4, 9:00 AM or 7:00 PM (Lisbon/London timezone)

Legal information:

ALL end consumers:  VAT at a 23% is included, regardless of the client’s fiscal jurisdiction.

B2B - Please contact us before you register for assistance with business accounts for tax and invoicing purposes (see above) or for large group bookings.

Businesses in the European Union (EU)*: VAT is not added for businesses with a verified VAT number (VIES). Price: 36.59 €, excl. VAT (EU member states reverse charge rules apply).

Businesses outside the EU*: VAT is not applicable. Price: 36.59 €. Legal business name and billing address are required for invoicing.

Businesses established in Portugal: IVA at a 23% is included. NIF or NIPC is recommended for invoicing.

Video/audio recordings: Due to local privacy law, recording of the session is strictly NOT permitted.