126 



BULLETIN 118, UNITED STATES NATIONAL MUSEUM. 



HARLEQUIN STONE (artificially colored crocidolite); three stones, cabo- 

 chon, circular and elliptical girdles; red, brown, and blue-gray; 16 by 7 



to 10 by 5 by 4 mm No. 1587 



JADE ; cabochon, elliptical girdle; green; 40 by 30 by 6 mm No. 1579 



JADE ; cabochon, circular girdle; dark green; 16 by 7 mm No. 1578 



MOONSTONE; four stones, cabochon, pendant; colorless; 26 by 16 to 22 



by 10mm .;... No. 1582 



MOSS AGATE; cabochon, rectangular girdle; light brown with dark in- 

 clusions; 19 by 12 mm No. 1575 



OLIVINE; three stones, brilliant and step, circular, square, and rectangu- 

 lar girdles; deep green; 12 by 8, 9 by 6, and 11 by 8 by 5 mm ...... No. 1601 



OPAL; two, one round, one bulb-shaped ; iridescent colors .-. . No. 1586 



PEARL; four round beads, white, 12 to 8 mm. diameter No. 1583 



PEARL ; four round beads; steel-gray; 12 to 8 mm. diameter No. 1585 



PEARL; four round beads; very pale pink; 12 to 6 mm. diameter No. 1584 



ROSE QUARTZ; five stones, cabochon, various girdles; pale pink; 15 by 



15 by 6 to 15 by 10 by 5 mm No. 1589 



RUBY (doublet) ; step-brilliant, circular girdle; deep red; 10 by 5.5 mm. . . No. 1608 

 RUBY; four stones, brilliant and step-brilliant; circular and square girdles; 



deep red; 13 by 7 to 8 by 4 mm No. 1593 



SAPPHDIE (doublet); two stones, brilliant, circular girdle; deep blue; 5 by 



3 mm No 1609 



SAPPHHiE; four stones, step-brilliant, circular and square girdles; deep 



blue; 12 by 6 to 4 by 3 mm No. 1594 



TOPAZ; three stones, step, rectangular and square girdles; pale pink; 34 



by 9 by 5, 11 by 8 by 5, and 8 by 6 mm No. 1599 



TOPAZ; cabochon, brilliant, and step-brilliant; various girdles; deep yel- 

 low; 27 by 16 by 10 to 9 by 7 mm No. 1597 



TOPAZ; step-brilliant, elliptical girdle; very pale red-orange; 26 by 15 by 



10 mm No. 1598 



TOURMALINE ; three stones; step-brilliant and brilliant, rectangular and 



elliptical girdles; deep pink; 12 by 10 by 5 to 6 by 5 by 3 mm No. 1600 



TURQUOISE ; 30 stones, cabochon, circular girdle; average size, 4 by 2 mm . . No. 1577 

 TURQUOISE (artificially colored chalcedony); two stones, cabochon, cir- 

 cular and elliptical girdles; blue; 16 by 6 and 20 by 6 by 3 mm No. 1576 



MODELS OF FAMOUS DIAMONDS. 



CULLrNAN, rough, and largest stone cut 



from it. 

 EMPRESS EUGENIE. 

 EXCELSIOR. 

 FLORENTINE. 

 GREAT MOGUL. 

 HOPE. 



KOHINOOR, before and after recutting. 

 NASSAK. 



ORLOFF. 



PASHA OF EGYPT. 



PIGGOTT. 



POLAR STAR. 



REGENT or PITT. 



SANCY. 



SHAH OF PERSIA 



STAR OF THE SOUTH. 



3. ARTIFICIAL OR SYNTHETIC STONES. 



A sharp distinction is to be drawn between the imitation of a gem 

 stone and its formation by artificial methods. The imitation gem 

 only simulates the natural substance; the artificial gem is identical 

 with it. Examples of the latter class are to be found in the diamond 



