xlvi 



TECHNICAL TERMS 



USED BY JEWELLERS AND LAPIDARIES. 



^ezils —The upper sides and corners (dd) 

 of the Brilliant, lying between the 

 edge of the Table and the Girdle. 



CahocJion. — The smooth convex elliptical 

 form used for cutting Precious 

 Garnet, Turquois, Opal, &c. Fig. e, 

 side view . Fig. f, plan. 



Collet — The small horizontal plane, or tace 

 (h) at the bottom of the Bnlhant. 



Crown. -The upper work of the Bose, 

 which all centres in the work at the 

 top, and is bounded by the hori- 

 zontal ribs. 



Facets. — Small triangular faces or planes, 

 both in Brilliants and Bases. 



In Brilliants there are two sorts, 

 Sheio-im^ Skill- facets, and Star- 

 facets. Skill-facets are divided into 

 upper and under. Upper Skill-facets 

 (c c) are wrought on the lower part 

 of the tiezil, and terminate m the 

 Girdle; Under Skill - facets (//) are 

 wrought on the Pavilions, and ter- 

 minate in the Girdle. Star-facets 

 {b 6) are wrought on the upper part 



of the Bezil, and terminate in the 

 Table. 

 Girdle.— The line (ee) which encompasses 

 the stone, parallel to the horizon ; or 

 which determines the greatest hori- 

 zontal expansion of the stone. 

 Goutte de suif is similar to Cabochon, only 

 the relief is not so great, and, conse- 

 quently, the form of the stone is 

 flatter ."^ 

 Lozenqes are common to Brilliants anci 

 Roses. In Brilliants they are formed 

 bv the meeting of the Skill-, and 

 Star-facets on the Bezil: in Boses, 

 by the meeting of the Facets m the 

 horizontal Ribs of the Crown. 

 Pavilions are the undersides and corners 

 Coo) of the Brilliants, and he 

 between the Girdle and the Collet. 

 Bibs. — The lines or ridges which dis- 

 tinguish the several parts ot tne 

 work, both of Brilliants and Boses. 

 Table.— The large horizontal plaaes or 

 faces (a) at the top of the Bril- 

 liant. 



Fig. c. 



Fig. e. 



Plan of the upper side of a Brilliant. 



Plan of the under side of a Brilliant. 



Plan of the ui>per side of a Rose. 



Side view of a iiose. 



Side view of a stone cut en cabochon. 



Plan of a stone cut en cabochon, or en goutte 



• suif. 



°'I', . . ^1 i-„« v.or,ootVi thP fiffures a b, is the distance between the Table and the 

 ColSf^r;i'e;SwSJl, s"hlYA?g^ve'„%oTs^;;e k sucha si.e as .ha. In .he figure, to insure 



the greatest amount of lustre. 



