﻿ENDLicH.l 
  APPENDIX 
  MINERAL 
  CATALOGUE. 
  227 
  

  

  pounds 
  will 
  be 
  noticed. 
  Nowhere 
  have 
  these 
  occurred 
  so 
  beautifully 
  

   developed 
  and 
  in 
  such 
  large 
  quantities 
  as 
  in 
  Boulder 
  and 
  Lake 
  Counties. 
  

   They 
  have 
  justly 
  attracted 
  the 
  attention 
  of 
  mineralogists 
  both 
  on 
  this 
  

   and 
  the 
  European 
  continents. 
  Although 
  a 
  considerable 
  amount 
  of 
  

   work 
  has 
  been 
  done 
  upon 
  them, 
  there 
  is 
  ample 
  opportunity 
  and 
  need 
  of 
  

   further 
  investigation. 
  As 
  the 
  mines 
  of 
  the 
  districts 
  in 
  which 
  these 
  

   minerals 
  occur 
  increase 
  in 
  depth, 
  we 
  may 
  possibly 
  be 
  able 
  to 
  obtain 
  

   some 
  definite 
  knowledge 
  as 
  regards' 
  the 
  vertical 
  distribution, 
  in 
  the 
  vein, 
  

   of 
  minerals 
  that 
  are 
  so 
  highly 
  volatile. 
  Many 
  discoveries 
  have 
  suc- 
  

   ceeded 
  the 
  first 
  ones 
  made 
  in 
  the 
  Gold 
  Hill 
  district 
  on 
  the 
  famous 
  Eed 
  

   Cloud 
  and 
  Cold 
  Spring 
  lodes. 
  New 
  districts 
  have 
  been 
  organized, 
  and 
  

   mining 
  is 
  carried 
  on 
  vigorously, 
  i)roducing 
  the 
  high-grade 
  ores 
  that 
  are 
  

   characteristic 
  of 
  the 
  presence 
  of 
  tellurets. 
  

  

  A 
  number 
  of 
  minerals, 
  such 
  as 
  pyrite, 
  chalcopyrite, 
  galenite, 
  sphaler- 
  

   ite, 
  and 
  others, 
  not 
  classed 
  as 
  "ores", 
  occur 
  throughout 
  the 
  entire 
  State. 
  

   The 
  former 
  more 
  particularly 
  in 
  ore-districts, 
  the 
  latter 
  (feldspars, 
  varie- 
  

   ties 
  of 
  quartz, 
  &c.) 
  everywhere. 
  In 
  such 
  a 
  case 
  merely 
  the 
  general 
  locality 
  

   has 
  been 
  given, 
  without 
  any 
  special 
  localities, 
  unless 
  these 
  contain 
  the 
  

   mineral 
  in 
  some 
  particular 
  form 
  or 
  association. 
  Since 
  1873 
  the 
  number 
  

   of 
  mineral 
  species 
  found 
  in 
  Colorado 
  has 
  increased 
  nearly 
  50, 
  showing 
  

   that 
  by 
  no 
  means 
  all 
  the 
  occurrences 
  are 
  known 
  as 
  yet. 
  Nearly 
  all 
  

   found 
  in 
  the 
  State, 
  with 
  but 
  five 
  or 
  six 
  exceptions, 
  are 
  primary 
  miner- 
  

   als. 
  After 
  the 
  mines 
  will 
  have 
  been 
  worked 
  for 
  some 
  length 
  of 
  time, 
  

   we 
  can 
  expect 
  the 
  formation 
  and 
  discovery 
  of 
  epigene 
  species 
  that 
  

   would 
  be 
  particularly 
  interesting 
  from 
  the 
  telluride 
  regions. 
  Numerous 
  

   localities 
  have 
  been 
  added 
  since 
  1873, 
  discovered 
  in 
  part 
  by 
  members 
  of 
  

   the 
  survey, 
  kindly 
  furnished 
  in 
  part 
  by 
  some 
  of 
  the 
  gentlemen 
  above 
  

   named. 
  

  

  Glancing 
  over 
  the 
  list, 
  we 
  find 
  that 
  Colorado 
  is 
  rich 
  in 
  minerals 
  that 
  

   may 
  be 
  classed 
  as 
  " 
  silver-minerals 
  ". 
  Many 
  of 
  the 
  species 
  belonging 
  to 
  

   this 
  group 
  are 
  here 
  represented 
  and 
  occur 
  at 
  a 
  number 
  of 
  localities. 
  

   Fewer 
  varieties 
  represent 
  the 
  lead 
  and 
  copper 
  minerals. 
  Silicates 
  are 
  

   found 
  in 
  their 
  chief 
  species, 
  but 
  good 
  crystals 
  of 
  any 
  one 
  of 
  them 
  are 
  

   rare. 
  

  

  Though 
  comparatively 
  a 
  small 
  list 
  for 
  a 
  State 
  containing 
  such 
  broad 
  

   expanses 
  of 
  mineral 
  lands, 
  it 
  represents 
  mainly 
  one 
  class 
  of 
  species, 
  

   those 
  pertaining 
  to 
  mining 
  industries, 
  and 
  the 
  enumeration 
  thereof 
  fur- 
  

   nished 
  is 
  sufficiently 
  complete 
  to 
  give 
  an 
  idea 
  of 
  their 
  distribution. 
  

   AcTiNOLiTE. 
  — 
  In 
  radiated 
  form, 
  of 
  light-green 
  color, 
  on 
  station 
  2 
  of 
  

   1873, 
  on 
  Buffalo 
  and 
  Sopris 
  Peaks, 
  Bergen's 
  Eanch, 
  and 
  Boulder 
  

   Peak. 
  

   ACTINOLITE, 
  CEYSTALLIZED.— 
  Bergen's 
  Eanch, 
  Jefferson 
  County, 
  Col- 
  

   orado. 
  

   Agate. 
  — 
  Cloudy, 
  of 
  white 
  and 
  gray 
  color 
  in 
  the 
  trachytic 
  formations 
  of 
  

   station 
  27 
  of 
  1873, 
  in 
  various 
  forms 
  at 
  the 
  Los 
  Pinos 
  agency, 
  in 
  South 
  

   Park, 
  in 
  the 
  Arkansas 
  Valley, 
  and 
  on 
  the 
  Frying 
  Pan, 
  in 
  varieties. 
  

   Throughout 
  Middle 
  Park, 
  valley 
  of 
  the 
  Gunnison, 
  and 
  adjoining 
  

   regions. 
  Moss 
  agate 
  below 
  Uncompahgre, 
  near 
  Grand 
  Elver. 
  

   Alabandite. 
  — 
  At 
  Quartzville. 
  

   Alabaster. 
  — 
  Mount 
  Vernon. 
  

   Allophanite. 
  — 
  Franklin 
  mine, 
  in 
  Gilson 
  Gulch 
  ; 
  Fowler 
  and 
  Wells's 
  

  

  branch, 
  Sugar 
  Loaf 
  district. 
  

   Altaite.— 
  Eed 
  Cloud 
  and 
  Cold 
  Spring, 
  at 
  Gold 
  Hill. 
  

   Alum. 
  — 
  Mount 
  Vernon. 
  

   Aluminite. 
  — 
  Mount 
  Vernon. 
  

   Amazon 
  Stone 
  (Adul 
  aria). 
  —Elk 
  Creek. 
  

  

  