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  : Échelle de Clarté des pierres précieuses

GemSelect utilise l'échelle de clarté suivante en classant les pierres précieuses:

IF interne irréprochable, exemptes d'inclusions
VVS Très, très légères inclusions; inclusions à peine visibles au grossissement 10x
VS Très légère inclusions; des inclusions peuvent être vu avec un grossissement de 10x
SI Faiblement inclus; petites inclusions visibles à l'œil nu
I1 Inclus; inclusions visibles à l'œil nu
  • First Published: April-04-2006
  • Last Updated: February-23-2011
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart