620 REPORT OF NATIONAL MUSEUM, 1900. 



Opal. La SilU'ta, Jalisco, Mexico. Mass of common opal. Color, grayish green, 



streaked. Cat. Nos. c-27; 5012L 

 Opal. Mexico. Translucent with play of color. Cabochon cut; elliptical girdle; 



high summit. Size, 2.5 by 1.7 by 1 mm.; weight, 20 carats. Cat. Nos. 461; 



84705. 

 Op(d. Mexico. Transparent with play of color. Cabochon cut; circular girdle; 



high summit. Size 1 by 0.9 by 0.8 mm.; weight, 2.75 carats. Cat. Nos. c-462; 



84705. 

 Opal. Mexico. Cabochon cut; elliptical girdle; low arch. Size, 1 by 0.8 mm; 



weight, 1.25 carats. Cat. Nos. c-463; 84705. 

 Opal. Honduras. Massive piece of fire opal. Cat. Nos. c-28; 8.3116. The Lea Col- 

 lection. Gift of Dr. L. T. Chamberlain. 

 Opal. Honduras. Two large gems; milky white. Caliochon cut. Cat. Nos. c-29- 



30; 50342. 

 Opal. Honduras. Ten small precious opals. Color, white. Cabochon cut. Cat. 



Nos. c-31-40; 50.342. 

 Opal. Czerwenitza, Himgary. Slab of trachyte containing small specks of precious 



opal. Polished. Cat. Nos. c-41; 45024. * 



Opal. Hungary. Color, white. Small gem. Cabochon cut. Cat. Nos. c-42; 84244. 

 Opal. Czerwenitza, Hungary. Color, bluish in gray trachyte. Cabochon cut. Cat. 



Nos. c-43; 50343. 

 OiKil. Baracoo River, Queensland. Small piece of beautifully variegated opal in 



argillaceous limonite. Uncut. Cat. Nos. c-44; 83448. 

 Opal. Baracoo River, Queensland, Australia. Two large precious ojials. Uncut. 



Cat. Nos. c-49-50; 83540. Lea Collection; gift of Dr. L. T. Chamberlain. 

 Opal. Baracoo River, Queensland, Australia. Veins of precious opal through 



matrix. Uncut. Cat. Nos. c-51; 81103. Gift of the Brisbane Museum. 

 Opal. Queensland, Australia. Two small pieces precious opal. Uncut. Cat. Nos. 



0-52-53; 51105. 

 Opal. Baracoo River, Queensland, Australia. Small polished slab containing 



deep blue opal. Cat. Nos. c-54; 45028. 

 Opal. Baracoo River, Queensland, Australia. Color, greenish blue. Two engraved 



opals on brown limonite. Cat. Nos. c-55-56; 50258. 

 Opal. Baracoo River, Queensland, Australia. Color, bluish. Seven small pieces. 



Cabachon cut. Cat. Nos. c-57-63; 51105. 

 Opal. Baracoo River, Queensland, Australia. Four small pieces of polished 



limonite containing precious opal. Cat. Nos. c-64-67; 48487. 

 Opal. Noto, Japan. Color, cream. Size, 5.7 by 2.3 cm. Cat. Nos. c-68; 18575. 

 Opal. Hacienda Esperanza, Queretaro, Mexico. Five fire opals. Cabochon cut. 



Total weight, 36.75 carats. Cat. Nos. c-459; 84481-3. One stone the gift of Dr. 



L. T. Chamberlain. 

 Orthodase, var. adularia. St. Gothard, Switzerland. Three small colorless gems. 



Cabochon cut; elliptical girdles. Size, 10 by 9 by 4 mm. =2; 7 by 5 by 2 mm. =1. 



Cat. Nos. c-264-266; 50380. 

 Pearl. India. Color, white. Necklace of 148 round pearls and two pear-shaped 



pearls. Cat. Nos. c-97-246; 47352. Gift of Imaun of Muscat. 

 Perthite. Perth, Canada. Color, brown. Cabochon cut; elliptical girdle. Size, 



45 by 35 by 10 mm. Cat. Nos. c-262; 51077. The Lea Collection. 

 Perthite. Perth, Canada. Color, brown with white veins. Cabochon cut; rectan- 

 gular girdle. Size, 33 by 13 by 5 mm. Cat. Nos. c-263; 84181. 

 Phenacite. Siberia. Colorless. Brilliant cut; rectangular girdle. Size 12.5 by 11 



by 7 mm.; weight, 5.10 carats. Cat. Nos. 830; 82914. The Lea Collection. 

 Phenacite. Siberia. Colorless. Brilliant cut; square girdle. Size, 8 by 8 by 5 mm.; 



weight, 2.09 carats. Cat. Nos. 831; 84069. 



