Our trained gemologists provide precise, impartial appraisals of diamonds, pearls and coloured gemstones — for insurance, inheritance or peace of mind.
Each assessment is grounded in a century of experience and the strict standards we hold for everything we handle.

Gemma & Co supplies jewellers across Sweden. Retail partners access pricing, availability and orders through our dedicated portal.
Retailer login →We receive clients by appointment — for the time and discretion fine jewellery deserves.