CATALOGUE OF GEMS. 6l7 



Malachite. Morenci, Arizona. Small geode. Cat. Noy. l>-884; 50113. 



Malachite. Morenci, Arizona. Color, green. Cube, with truncated edges. Size, 5 



cm. diameter. Cat. Nos. b-88o; 50267. 

 Malachite. Morenci, Arizona. Color, dark green. Slab. Cat. Nos. I1-886; 82488. 

 Malachite. Morenci, Arizona. Polished to show l)anded structure. Cat. Xos. b-887; 



50112. 

 Malachite. Morenci, Arizona. Color, blue and green. Polished slabs. Cat. Nos. 



b-888-890; 84234. 

 Malachite. Siberia. Color, bright green, banded. Tabular cut; elliptic-al girdle. 



Size, 40 by 32 by 4 mm. Cat. Nos. a-618; 51139. 

 Malachite. Siberia. Color, dark green, with light green concentric rings. Size, 31 



by 4 mm. Cat. Nos. a-619; 51139. 

 Malachite. Siberia. Color, bright green, with brown bands. Cabochon cut; cir- 

 cular girdle. Size, 34 by 6 mm. Cat. Nos. a-620; 82904. 

 Malachite. Siberia. Color, dark green, banded. Cabochon cut; elliptical girdle. 



Size, 33 by 26 by 5 mm. Cat. Nos. a-621; 84169. 

 Malachite. Ural Mountains, Siberia. Color, deep green. Large Botryoidal mass. 



Cat. Nos. b-891; 45088. 

 Malachite. Siberia. Color, green. Polished piece. Cat. Nos. b-892; 45032. 

 Malachite. Ural ^Mountains, Siljeria. Color, green. Composite slab mounted on 



slate. Cat. Nos. b-893; 51483. 

 Malachite. Australia. Color, green. Polished piece. Cat. Nos. b-894; 81284. 

 Malachite. Bembe, West Africa. Color, green. Polished slab. Cat. Nos. b-895; 



49239. Gift of Mrs. 3Iary I. Stroud. 

 Marble, see Carbonate of lime. 

 MIcrocline, var. amazonstone. Media, Delaware County, Pennsylvania. Color, green, 



with flesh bands. Elliptical disk. Size, 17 by 11 by 3 mm. Cat. Nos. a-688; 



48921. Gift of Dr. Robert H. Lamborn. 

 Microcline, var. Amazonstone. Mineral Hill, Delaware County, Pennsylvania. Color, 



green, with flesh-colored veins. Cabochon cut; elliptical girdle. Size, 45 by 34 



by 12 mm. Cat. Nos. a-698; 49718. The Lea Collection. 

 Microcliiu:, var. amazonstone. Amelia Court-House, Virginia. Color, green. Cabo- 

 chon cut; elliptical girdle. Size, 48 by 34 by 9 mm. Cat. Nos. a-697; 48721. 

 Microcline, var. amazonstone. Amelia Court-House, Virginia. Color, light green. 



Small tray. Cat. Nos. b-835; 84221. 

 Microcline, var. amazonstone. Amelia Court-House, Mrginia. Color, green. Two 



balls. Size, 40 mm. and 37 mm. diameter. Cat. Nos. c-451-452; 84261. The 



Lea Collection; gift of Dr. L. T. Chamberlain. 

 Microcline, var. amazonstone. Pike's Peak, Colorado. Color, green. Cabochon 



cut; elliptical girdle. Size, 28 by 22 by 8 mm. Cat. Nos. a-696; 50383. 

 Microcline, var. amazonstone. Siberia. Color, green. Cabochon cut; elliptical 



girdle. Three gems. Sizes, 17 by 13 by 4 mm., 22 by 17 by 4 mm., 15 by 11 



by 5 mm. Cat. Nos. a-700-702; 50382. 

 Microcline, var. amazonstone. Siberia. Color, green. Cabochon cut; elliptical 



girdle. Size, 18 by 13 by 3 mm. Cat. Nos. a-703; 82861. The Lea Collection. 

 Microcline, var. amazonstone. Siberia. Color, green. Rectangular slab. Size, 72 



by 40 l)y 4 mm. Cat. Nos. a-704; 51445. Gift of C. S. Bement. 

 Microcline, var. amazonstone. Color, green. Cabochon cut; elliptical girdle. Size, 



33 by 24 by 10 mm. Cat. Nos. a-705; 45118. 

 Moldavite, see Obsidian. 

 Moonstone, see Albite or Oligoclase. 

 Mosaic. Ekaterinburg, Siberia. Jewel })ox made of rhodonite, aventurine quartz, 



agate, and jasper. Cat. Nos. b-837; 51.397. 

 Mosaic. Russia. ^losaic slab of the Seventeentli Century, made of agate and lapis 



lazuli mounted on slate. Cat. Nos. b-838; 51396. 



