an (English spoken) tv series that aired in Europe around the 80’s-90’s
about a woman that is trained by an older man to be a professional jewel thief
with the following scenes:
– during her training the teacher gives here a beautiful neckless in what appears
beautiful stones but she immediately says that is all a fake
– she participates on a high society party and while walking around in the party
she says from each neckless/jewel piece that the sees the type of gemstone like diamonds, the carats (that is a special weight measure for jewels) and the possible value.
Maybe: If Tomorrow Comes (1986) – http://www.imdb.com/title/tt0090455/
Entrapment (1999) with Sean Connery and Catherine Zeta Jones?