A unique number is assigned to each preliminary exam.
This field allows you to specify whether we have received a single stone, a batch or a piece of jewellery, and the type of jewellery.
The shape, size and dimensions describe the stone’s external appearance. When you submit a piece of jewellery containing several stones, or a batch of stones, we note the variation in diameter within the batch.
The shape, size and dimensions describe the stone’s external appearance. When you submit a piece of jewellery containing several stones, or a batch of stones, we note the variation in diameter within the batch.
The weight of the stones is given in carats (1 ct = 0.2 g) to two decimal places. Rounding is based on the third decimal place: if it is less than 9, the figure is not rounded; if it is 9, the figure is rounded up.
E.g.: 0.9990 ct is stated as 1.00 carat, but 0.9989 ct is stated as 0.99 carat.
In the case of jewellery set with stones, it is weighed in grams to two decimal places. The rounding rule applied is arithmetic rounding.
LA SCIENCE AU SERVICE DES GEMMES • Depuis 1929
30, Rue de la Victoire • 75009 Paris • tél. +33 (0)1 40 26 25 45
SASU au capital de 100 000€ € • SIRET : 52909868300012 • RCS Paris B 529 098 683
APE : 7490B (activités spécialisées, scientifiques et techniques diverses) • TVA intracommunautaires : FR89529098683
contact@lfg.paris • https://www.laboratoire-francais-gemmologie.fr/
For your gemstones or jewellery,
We offer three types of gemmological report to suit your needs:
Initial identification prior to purchasing stock or cutting stone – Textured A4 letter
The gemmological report for the end buyer – A5-sized Bristol board booklet
A prestigious, bespoke gemmological report showcasing exceptional gemstones and jewellery – a three-panel canvas folder in A4 landscape format.
