ENDLicH.] CATALOGUE OF COLORADO MINERALS. 143 



Peak. On Bear Creek; massive, pink and violet in the Sweet Home 

 Home Mine, Clear Creek, and James Creek. Massive on Kendall 

 Mountain, Howardsville. 



Franklinite. — Occurs in Mispickel (arsenopyrite), on Kio Dolores. 



Freieslebenite. — At the head of Cement Creek, near Baker's Park. 



Galenite. — In narrow seams, fine-grained in the Winnebago lode ; 

 feathery in the Dallas Mine; coarse-grained in the J. P. Whitney, 

 Eunning, Monte Cristo, Forks, and other mines of Gilpin County. lu 

 the Colorado Central, Equator, Star, Pelican, Terrible, and others near 

 Georgetown, it occurs in very large quantities. At the Cold Stream 

 very fine crystals are found, combinations of cube and octahedron, 

 rarely rhombic dodecahedron. The International, on Mount McClel- 

 lan, at an elevation of 12,800 feet, has a heavy vein of galenite. The 

 No-Name, Fourth of July, Caribou, and others in Boulder County 

 cootain the mineral. Silver Hill mines (fine-grained) and the Kosita 

 mines in Hardscrabble district. Hamilton, the mines around Fair 

 Play show crystals ; the mines of Elk Mountain district, the head of 

 Iowa and Empire Gulch, contain galenite. In small, scattering quan- 

 tities it is found almost throughout the State. Bear Creek, Grey 

 Gulch. The Highland Mary, the mines of Cunningham and Arastra 

 Gulches, on the forks of the Animas, in the Sneffels and Uncompahgre 

 districts. Throughout the San Juan mines galenite is one of the prin- 

 cipal ores. Invariably it is argentiferous, although the quantity of 

 silver it contains changes greatly. 



Garnet. — Crystallized in rhombic dodecahedra and sometimes icosite- 

 trahedra, associated with epidote on Gunnell Hill, Central. This 

 occurrence {sjpessartite) closely resembles the garnets from Auerbach, 

 in Germany. Occurs frequently in micaceous schists, Ouray group, 

 northern end of Sangre de Cristo Eange. On Trail Creek, Bergen, 

 &c. Montgomery, Bear Creek, Tucker's Gulch. Near the southwest 

 corner of Colorado, found in drift (ahnandite). 



Glauber salt. — Bear Creek, Smoky Creek. At a number of hot 

 springs in Colorado. 



Glockerite. — Central City, Idaho Springs. 



GoETHiTE. — Occurs with hematite on Topaz Buttes. 



Gold. — Native gold in very small and in distinct crystals in the Bob- 

 tail, Gunnell, Kansas, and on Quartz Hill, near Central. In the gold 

 gulches of Gilpin County. Many of these are worked out, others 

 still yield nuggets and fine-gold. On Clear Creek. Tarryall Creek ; 

 Placer-diggings, near Fairplay, in imperfect crystals and laminae. In 

 Washington and California Gulches ; in the placers of Union Park, 

 and many other localities. In the Elk Mountains. Placers on San 

 Miguel, on the Mancos and La Plata. Near Parrott City ; in the Lit- 

 tle Giant Mine, near Silverton, associated with ripidolite. Occurring 

 as the result of decomposition of the tellurids in the Bed Cloud, Cold 

 Spring, and other lodes near Gold Hill. In the Ward and Sugar 

 Loaf districts. In the American, Grand View, Silver Dale, and other 

 mines in the Sunshine district. Impregnated in volcanic rock in the 

 Summit district. It is very finely distributed there, and contained 

 in pyrite. Upon the decomposition of pyrite, gold becomes free. In 

 the Little Annie it was first discovered in this district. At Oro City, 

 in rhyolite. In some of the South Park mines, in Potsdam sandstone. 

 At the Nevada lode, in azurite. Very fine although small crystals have 

 been lately obtained from the Gunnell, near Central. They are bright, 

 en black sphalerite, and show combinations of cube, octahedron, and 

 rhombic dodecahedron. Mixtures of gold and silver are found as the 

 result of decomposition of tellurids containing both metals. 



