GEM TREATMENTS

Online lesson: Winter 2026 Program (SESSION 1) A quick look into the most relevant gemstone treatments today, including the various types of heat-related processes, irradiation, fracture and cavity filling, impregnation, bleaching, dying, various coating processes, laser-related treatments and HPHT, with a few examples. Discussion on their impact, treatment disclosure and industry best practices according to CIBJO standards.

JANUARY 5, 9:00 AM or 7:00 PM (Lisbon/London timezone)

Legal information:

ALL end consumers:  VAT at a 23% is added, 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). EU member states’ reverse charge rules apply).

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

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