256 Oligoclase, light-green, transparent, with white, 



snow-like cavities. Bakersville, North 

 Carolina. 



257 Oligoclase, transparent, cut stone. From near 



Bakersville, North Carolina. 



258 Peristerite, cut stones. Macomb, St. Lawrence 



County, New York. 



259 Peristerite, polished specimen, 4x2} inches. 



Bathurst, Canada. 



260 Sunstone, cleavage specimen. Media, Delaware 



County, Pennsylvania. 



261 Perthite, polished slab. Quebec, Canada. 



262 Pegmatite (graphic granite), polished specimen. 



Auburn, Maine. 



263 Pegmatite (graphic granite), polished. Connecti- 



cut. 



264 Porphyry, green, polished specimen. Cumber- 



land, Rhode Island. 



265 Obsidian, four cut stones. Yellowstone Park. 



266 Obsidian, rounded pebbles. Fort Defiance, Ari- 



zona. 



267 Obsidian, polished specimen, 4x3 inches. Ob- 



sidian Cliff, Yellowstone Park. 



268 Obsidian (banded brown and black). Mono 



County, California. 



269 Obsidian (iridescent). Lake County, California. 



270 Obsidian. Las Navajo.. Hidalgo, Mexico. 



271 Obsidian (" mountain mahogany "), two polished 



slabs, 3 x 3! inches. State of Jalisco, 

 Mexico. 



272 Obsidian, dish, 2\ x 2 x 1 inches. State of Jalisco, 



Mexico. 



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