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CAC
Cacholong, variety of opal, 183,
184. Caillaud, discovered emerald mine,
133-
Cairngorm, 159-160.
Callaite, ancient name of turquoise, 182.
Cameos, onyx used for, 167 ; jasper used for, 1745 turquoise, 182.
Carbonate, or diamond carbon, 62.
Carbuncle, in High Priest's breastplate, 36, 39, 40 ; Scriptural mention, 46 j variety of garnet, 142, 144.
Carnelion, 168.
Cat's eye, 115, 117, 172.
Ceylon, account of pearl fishery in, 190-193.
Ceylonite, 119.
Chalcedonyx, variety of chalcedony, 169.
Chalcedony, found with Chrysoprase, 162$ account of, 169,
Characteristics of gems, table of, 220.
Chemical
properties of gems, 3-20 j analyses of ruby, 102 j chryso-beryl, 116 ;
spinel, 120 ; topaz, 124; emerald and beryl, 131 ; hyacinth, 139;
garnet, 143 ; tourmaline, 149 ; quartz, 152 ; amethyst, 157 5
Chrysoprase, 162 ; chrysolite, 177 ; turquoise, 179 ; opal, 183 ;
moonstone, 203 ; lapis lazuli, 204 ; malachite, 206 ; labradorite, 207
$ jade, 209; amber, 210.
Chloro-spinel, 119.
Chrysoberyl, 115-118 ; confounded with cat's eye, 172.
Chrysolite, in High Priest's breastplate, 44; account of, 176—178.
Chrysolite, oriental, 115.
Chrysoprase, chrysoberyl of the ancients, 118 ; account of, 162.
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DIA
Cinnamon-stone, variety of garnet, 142, 146, 160.
Classification of gems, 32.
Colophonite, variety of garnet, 142, 146.
Colour of gems, 8 ; table of stones arranged according to their colours, 229.
Combustibility of the diamond, 51.
Coral, Scriptural mention, 46 ; account of, where found, &c. 213-216.
Corundums, 101, 114.
Coster's diamond-cutting mills, 67.
Crushing diamonds, 70.
Cumberland diamond, account of, 80.
Cutting gems, art of, 31; diamond cutting, 63—68; cutting coloured stones, 97-100 ; ruby, 108 ; sapphire,
110; chrysoberyl, 117 ; spinel, 123; topaz, 126; emerald, 136; garnet,
145; tourmaline, 150; rock crystal, 156; amethyst, 158 ; cairngorm,
160; Chrysoprase, 1625 onyx, 164; jasper, 175; chrysolite, 177;
turquoise, 181 ; opal, 184, 186; moonstone, 203 j coral, 215.
Cymophane, 115-118.
D
IAMOND, its material,
3 ; refractive power, 10 ; mention by Plato, 24; Pliny, 25, 295
Serapius, 29 ; in High Priest's breastplate, 36, 41 ; Scriptural
mention, 47 ; account of, its properties, varieties, &c. 48—96
cutting, 67 ; polishing, 68 ; crushing, 70 ; splitting, 71 ;
names of forms, 72 ; account of large diamonds, 78-86 ; value, 87-96;
resemblance of sapphire to, 114.
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