culasse

Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • noun The lower faceted portion of a brilliant-cut diamond.

Examples

  • It is a remarkably excellent imitation -- silicate of alumina; the weight, color, and hardness, the measurements -- table, girdle, and _culasse_ -- all correspond exactly with the original.

    The Paternoster Ruby

  • This portion is called the "girdle," and if we take this as a defining line, that portion which appears above the setting of this girdle, is called the "crown"; the portion below the girdle is called the "culasse," or less commonly the "pavilion."

    The Chemistry, Properties and Tests of Precious Stones

Note

The word 'culasse' comes from a French word meaning 'back'.