Daily useful info
During one day's work, many different on-line sources may be useful. Here goes the links that were useful to me! Let me know yours, especially if some of them are specific to your job or country!
Let's start with important data to keep in mind:
1 carat (ct) = 0,2 gram (g)
1 gram (g) = 5 carats (ct)
Some US companies, like auction houses, may give you the gross weight in pennyweights (dwt).
1 pennyweight (dwt) = 1.55517384 gram (g)
Converter from grams to carat: Metric Conversion
Old currency converter: here
French VAT calculator: www.tva.fr
Metal rate €urope: Cookson-CLAL
Metal rate in Dollar$ : Kitco
On-line very efficient translator: DeepL Translator
One must however be very careful and always have a native person proofread the document that you have translated with an on-line translator, specifically if it tackles technical subjects (manufacturing, contracts, etc.)
Research Jewel : a very thorough website created by Vanessa Cron (yearly fee charged but you may test it for 24h for free)
On-line encyclopedia of Silver Marks, Hallmarks & Makers' Mark (free of charge)