﻿SAPPHIRES 
  AND 
  RUBIES 
  IN 
  SITU 
  WITH 
  CORUNDUM. 
  

  

  305 
  

  

  Sp. 
  gr. 
  3-766. 
  Sp. 
  gr. 
  3-797. 
  

   Spinel 
  Fine-grained. 
  Coarse-grained. 
  

  

  Koenig. 
  

  

  Alumina 
  54 
  - 
  32 
  

  

  Sesqui 
  oxide 
  of 
  chromium 
  3'96 
  

  

  Sesquioxide 
  of 
  iron 
  11-51 
  

  

  Protoxide 
  of 
  iron 
  11-16 
  

  

  Magnesia 
  19'05 
  

  

  Oxide 
  of 
  copper 
  

  

  Oxide 
  of 
  nickel 
  

  

  Koenig. 
  

  

  56-58 
  

  

  2-28 
  

  

  9-66 
  

  

  14-60 
  

  

  16-88 
  

  

  Sp. 
  gr. 
  3-695. 
  

  

  Dark 
  green. 
  

  

  Genth. 
  

  

  66-63 
  

  

  trace. 
  

  

  1-80 
  

  

  11-35 
  

  

  19-86 
  

  

  0-11 
  

  

  0-25 
  

  

  10000 
  

  

  10000 
  

  

  Jeiferisite 
  

  

  Koenig. 
  

  

  Silica 
  33-93 
  

  

  Alumina 
  17'38 
  

  

  Sesquioxide 
  of 
  iron 
  5-42 
  

  

  Protoxide 
  of 
  iron 
  0'50 
  

  

  Protoxide 
  of 
  nickel 
  0*35 
  

  

  Magnesia 
  2343 
  

  

  Ignition 
  loss 
  19 
  - 
  17 
  

  

  Broadly 
  foliated. 
  

  

  Chatard. 
  

  

  33-77 
  

  

  17-56 
  

  

  5-61 
  

  

  0-50 
  

  

  ? 
  

  

  22-48 
  

  

  20-30 
  

  

  10018 
  

  

  10022 
  

  

  10000 
  

  

  Scaly. 
  

  

  Chatard. 
  

  

  3400 
  

  

  20-36 
  

  

  4-91 
  

  

  0-42 
  

  

  0-57 
  

  

  21-71 
  

  

  1S-50 
  

  

  100-47 
  

  

  Chlorite 
  Foliated 
  dark 
  green. 
  

  

  Genth. 
  

  

  Silica 
  27-56 
  

  

  Alumina 
  2275 
  

  

  Sesquioxide 
  of 
  iron 
  2 
  - 
  56 
  

  

  Protoxide 
  of 
  iron 
  5'43 
  

  

  Oxide 
  of 
  nickel 
  with 
  cobalt 
  1 
  

   Oxide 
  of 
  manganese 
  J 
  

  

  Magnesia 
  28'47 
  

  

  Ignition 
  loss 
  13.80 
  

  

  0-30 
  

  

  Fine 
  scaly. 
  

   Genth. 
  

   29-48 
  

   22-22 
  

  

  0-70 
  

  

  5-30 
  

  

  0-11 
  

  

  017 
  

   30-99 
  

   11-63 
  

  

  100-87 
  

  

  Margarite, 
  sp. 
  gr. 
  3 
  - 
  087. 
  

   Chatard. 
  

  

  Silica 
  28-80 
  

  

  Alumina 
  49"57 
  

  

  Sesquioxide 
  of 
  iron 
  

  

  Protoxide 
  of 
  iron 
  034 
  

  

  Magnesia 
  075 
  

  

  Lime 
  11 
  "33 
  

  

  Ignition 
  loss 
  6 
  - 
  64 
  

  

  Soda, 
  potash 
  and 
  lithia 
  undetermined 
  

  

  Maconite, 
  sp. 
  gr. 
  3-827. 
  

   Chatard. 
  

  

  Silica 
  34-20 
  

  

  Alumina 
  2T66 
  

  

  Sesquioxide 
  of 
  iron 
  12-54 
  

  

  Protoxide 
  of 
  iron 
  - 
  32 
  

  

  Nickel 
  with 
  cobalt 
  0-13 
  

  

  Magnesia 
  14-61 
  

  

  Lithia 
  trace. 
  

  

  Soda 
  0-50 
  

  

  Potash 
  5-91 
  

  

  Ignition 
  loss 
  11*90 
  

  

  10000 
  

  

  Staurolite, 
  sp. 
  gr. 
  3-711. 
  

  

  Genth. 
  

  

  27 
  91 
  

  

  52-92 
  

  

  6*87 
  

  

  7-80 
  

  

  3*28 
  

  

  trace. 
  

  

  1*59 
  

  

  100-37 
  

  

  Kerrite, 
  sp. 
  gr. 
  2-303. 
  

  

  Chatard. 
  

  

  38-26 
  

  

  11-42 
  

  

  1-97 
  

  

  0-32 
  

  

  0-22 
  

  

  26-50 
  

  

  101-77 
  

  

  21*28 
  

   99-97 
  

  

  