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Caligula, the attempt of, to find gold in orpiment, 200
Cappadocia, a source of red ochre, 56, 175
Carnelian, 123
Carthage, ancient point of export for precious stones, 48, 52, 90-91, 104
Ceos, a source of red ochre, 56, 176-77
Ceramic ware, classed as stone, 161
Cerussa, Latin name for white lead, 187-
9i Chalcedon, 50, 104 Chalcedony: banded, 127-28; green, 138;
red, 122-23 Chalk, 210, 213 Charcoal, 47, 48, 85-86 Chernites, probably a variety of Egyptian
onyx marble, 46, 73 Chian marble, 71-72
Chian stone, 46, 52, 71-72, 75-76, 130-31 Chios, a source of variegated marble, 71-
Chrysoberyl, 138
Chrysocolla, modern meanings of, 105
Chrysocolla, Latin name for Chrysocolla,
105, 106 Chrysocolla: a green copper mineral, 50-
5Σ> 53» 56, 105, M3; a green pigment,
53, 174; an alloy for soldering gold, 106 Chrysoprase, 108, 121 Cilbian District, near Ephesos, a source of
cinnabar, 195 Cilicia: source of a viscid earth, 55, 167-
68; source of whetstone, 150 Cimolite, 209
Cinnabar, 57-58, 193-99, 203-204 Classification: of coral, 141; of earths, 169-
70; of minerals, 129 Clay(s), 208, 209 Clay ironstone, nodules of, identified with
aetiles, 69 Clothes, cleaning or whitening of, 59, 60,
213, 218-219 Coal(s), 48, 81, 85-86 Coins, 90, 154-55
Colchis, a source of cinnabar, 57, 195-96 Collyrium, a variety of Samian earth, 212-
Color: earths classified by, 56, 169-70;
sex of stones determined by, 52, 124-25 Coloration: of glass by copper, 163; of
water by smaragdos, 45-46, 50, 98-99 Combustion, 82-83, 93 Comum (Como), in Italy, source of a
green stone, 145 Concretions, 68-69
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Copper: 47, 51, 55, 57, 162-64, 165-67,
191-93; alloys of, 164-67; red, 57, 191 Copper acetate, 192-93 Copper carbonate, 105, 143, 174-75, 183 Copper salts, used in making imitation
smaragdos, 98 Copper silicate, 105 Copperas, 207 Coral, 53, 140-41 Corinth: excavations at, 171-72, 189;
source of an attractive stone, 52, 132 Corundum, 91, 147
Cosmetic, ancient use of white lead as, 190 Cow-manure, as a fuel for burning gypsos,
60, 220-21 Crete, a source of whetstones, 150 Croesus, 158 Crystals: of anthrax, 91; of colorless quartz,
121; of tourmaline, 109 Cuprite, 144 Cyitis, a stone containing embryo stones,
69 Cyprus: block or crystal of two colors found
in, 51, 108-109; as a source of false
smaragdos, 50, 104, of gypsos, 59, 6o,
213, of iaspis and smaragdos, 52, of
kyanos, 183
Daedalos, 203
Darius, 46
Dek, an island in Lake Tana, Ethiopia, 133
Demonesos, ancient source of copper minerals, 104, 183
Demostratus, in, 115
Dendrachates, moss agate, 128
Density: of certain minerals, 53, 143; of pumice, 49, 95
Dtabaros {Diaboros), porous stone, 49, 94
Diamond, 148
Didymus, 217
Diokles of Karystos, 51, 113, 201
Diorite (or Diorite-Gneiss), 75
Dioscorides, 94, 105, 107, 108, in, 142, 143, 148, 167, 172, 178, 179, 181, 183, 189, 192, 207, 208, 209, 213
Dishes, 54, 146
Dolomite, 145
Dorians, 53
Eaglestone, 69
Earth: medicinal, 177-78; unusual, 55,
162-63; vitreous, 55, 161 Earthenware, brittleness of, explained, 78-
79
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