686 



INDEX 



Chlorine, tests, 588. 

 Chlorite, 497, 601, 615. 

 Chloropal, 659, 660. 

 Chlorophane, 333. 

 Chondrodite, 471, 679. 

 Chromates, 236. 

 Chromic iron ore, 376. 

 Chromite, 233, 337, 376, 596, 609, 



659. 



Chromium, tests, 568. 

 Chrysoberyl, 377, 6.81. 

 Chrysocolla, 503, 601, 644. 

 Chrysolite, 446, 680. 

 Chrysoprase, 360. 

 Chrysotile, 500. 

 Churchite, 657. 

 Cinnabar, 304, 598, 629, 641. 

 Cinnamon stone, 443. 

 Circular polarization, 196. 

 Cirrolite, 655. 

 Citrine, 359. 

 Classes of crystals, Ifl. 

 Classification of minerals, 222, 232. 

 Claudetite, 346, 640. 

 Clausthalite, 627. 

 Clay, 502. 

 Cleavage, 256. 

 Cleveite, 525. 

 Cliftonite, 284. 

 Clinoaxis, 120. 

 Clinochlore, 497, 672, 678. 

 Clinoclasite, 643. 

 Clinodome, 123. 

 Clinographic projections, 33. 

 Clinohedrite, 127, 650. 

 Clinohumite, 471, 679. 

 Clinopinacoid, 123. 

 Clinozoisite, 465, 674, 676. 

 Clintonite, 496, 497, 678. 

 Closed tube, 557. 

 Clove oil, 215. 

 Cobalt bloom, 617. 

 Cobalt solution, 562. 

 Cobalt, tests, 574. 

 Cobaltite, 316, 597, 621. 

 Colemanite, 524, 664. 

 Collophanite, 655. 

 Coloradoite, 626. 

 Color, of beads, 594. 



of coats, 593. 



of flame, 552, 



of minerals, 273. 



order of, 1 83. 

 Columbates, 236. 

 Columbite, 505, 596, 634. 

 Columbiun, tests, 570. 

 Columnar habit, 265. 

 Combinations of forms, 22, 53. 

 Common garnet, 442. 

 Common opal, 369. 

 Common salt, 327. 



634, 



Compact structure, 268. 

 Compensation, 189. 

 Compensator, 189. 

 Composition, chemical, 231. 



plane, 138. 

 Comptonite, 488. 

 Conchoidal fracture, 258. 

 Conichalcite, 643. 

 Connellite, 642. 

 Constancy of angles, 10. 

 Constitutional formula, 234. 

 Constitution, water of, 226. 

 Contact goniometer, 12, 149. 

 Contunnite, 641. 

 Convergent light, 191. 

 Cookeite, 496, 671. 

 Copiapite, 636.. 

 Copper, 288, 598, 631. 



glance, 300. 



pyrite, 310. 



tests, 580. 

 Copperas, 539. 

 Coprolites, 509. 

 Coquimbite, 540, 636. 

 Cordierite, 440. 

 Cornwallite, 643. 

 Corundophilite, 498. 

 Corundum, 91, 341, 605, 611, 681. 

 Corynite, 622. 

 Cosalite, 628. 

 Cotunnite, 647. 

 Covellite, 306, 629, 644. 

 Crednerite, 631. 

 Critical angle, 166. 

 Crocidolite, 435, 659. 

 Crocoite, 533, 649. 

 Cronstedtite, 658. 

 Crookesite, 627. 

 Crossed dispersion, 209. 

 Crossed nicols, 186. 

 Cryolite, 333, 601, 662. 

 Crystal, 6. 



axes, 15. 



aggregate, 135. 



forms, 21. 



measurement, 153. 



structure, 4- 

 Crystalline, 3, 238. 

 Crystalline elements, 24- 

 Crystallization, 6, 245. 

 Crystals, 1. 



optical properties, 160. 



physical properties, 256. 

 Cubanite, 629. 

 Cube, 51. 

 Cubic system, 47. 

 Cullinan diamond, 283. 

 Cumengite, 644. 

 Cuprite, 337, 598, 631, 644. 

 Cuprobismutite, 628. 

 Cuproiodargyrite, 645. 



