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MISE CROIX MISE HUIT RETABLISSEMENT SYMETRIE POLISSAGE [1 record]

Record 1 2007-01-19

English

Subject field(s)
  • Gemmology
  • Diamond Industry
CONT

Describe crossworking: a) establishes symmetrical crown and pavilion main facets to specific angles and indices b) consists of two steps: - blocking the diamond ... lapping the diamond ...

CONT

Polishing: Removing material from a diamond to form facets; done in stages; crossworking (to set main facets), brillianteering (to finish the diamond); also referred to as cutting, grinding, running and smoothing.

OBS

blocking: [The] process of placing the table, the first four facets on the crown, and the first four facets on the pavilion of a rough or prepared diamond. To a large extent, blocking determines the symmetry and weight of the polished diamond as well as its brilliance and dispersion. In stones under 50 points, the process is often combined with cross-working.

Key term(s)
  • cross working
  • cross-working

French

Domaine(s)
  • Gemmologie
  • Industrie diamantaire
DEF

Taille des facettes principales de couronne et de culasse à des angles et positions spécifiques.

Spanish

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