Page:Handbook of Precious Stones.djvu/42

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26

PRECIOUS STONES.

be arranged into the two groups (1) those having plane surfaces; (2) those having curved surfaces: but, under special circumstances, facets or plane surfaces are occasionally associated with curved surfaces in the same specimen. The further subdivision of the two groups of forms may be tabulated thus:

Group 1. Plane surfaces		Brilliant-cut.
		Step or trap-cut.
		Table-cut.
		Rose-cut.
Group 2. Curved surfaces		Single cabochon.
		Doable cabochon.
		Hollowed cabochon.
		Tallow top.

A few words descriptive of each of these modes of cutting stones may now be given.

The old brilliant-cut, though susceptible of many small modifications as to the size of the facets, their mutual proportions and inclinations, and even their number, requires, when perfect, 58 facets thus arranged:

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Fig. 12.

1 Table

The "Crown," or upper part of the brilliant.

8 Star facets

4 Templets or bezels

4 Quoins or lozenges

8 Cross or skew facets 1

8 Skill facets^[1]

—

33

↑ The cross and skill facets are sometimes called half-facets; the former are known as clôtures by the French lapidaries.

[1] The cross and skill facets are sometimes called half-facets; the former are known as clôtures by the French lapidaries.

[1]