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INDEX
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Persian Gulf: a modern source of red ochre, 179; a source of pearls, 53, 134-35
Petrifaction, of objects placed in stone vessels, 67
Pharis, supposed name of a place, 211
Pharma\itis, an earth used for treating vines, 167
Phlogiston theory, 171
Phoenicia: gypsos made or used in, 59, 60, 214, 220-21; tribute sent from, 57, 185186
Pigments: blue, 56, 57, 175, 183-87; green,
56, 57. 174. 193; red, 56-57, 57-58, 17172, 175, 176-83, 193-99; relation between size of particles and color, 57, 184, 187; specimens found in archaeological excavations, 171-72, 173, 174, 177, 181, 185, 189-90, 194, 218; white,
57, 58-59, 187-91, 210-11, 218; yellow, 56, 171-72, 173-74, 175. 181-83
Pinna, a bivalve mollusk, 52, 134
Pitchstone, 131
Plasma, 100, 108
Plaster of Paris, 210, 213, 217-18
Plato, 63, 117, 118
Pliny, 67-68, 69, 71, 72, 81, 83, 84, 91, 92, 94, 96, 97-99, 102-103, 105-106, 107-15, 121, 122, 123, 124-25, 127-29, 131, 134, 136-37, 138, 139» 141, 14243, 148-50, 152-53, 158, 173-74. 175. 177, 178-79, 181, 191-92, 193, 197, 200, 207, 216-17
Polygnotus, 175
Pompeiopolis, realgar mine at, 172
Pontic wax, 166
Pontus, a source of orpiment, 172
Pontus River, 80
Poros (pons stone), a name denoting certain soft calcareous rocks, 46, 73-75
Porous stone, 49, 94
Porphyry, 75
Potstone, 145-46
Pottery, resistance of, to fire, 47, 78-79
Prase, 100
Prasitis, an opaque green stone, 53, 137-38
Prasius, 138
Praxiboulos, archon at Athens, 58, 200-202
Precious stones, in antiquity, value of, go
Prehnite, 120
Prince Islands, 104, 183
Procreation, power of, in stones, 46, 6869
Psebo, 133
Psepho, 52, 132-33
Pumice, 48, 49, 83-84, 92-96
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Puteoli, blue frit manufactured at, 185 Pyrargyrite, 144
Pyrite: associated with cinnabar, 199; in coal, 81; particles of, in sappheiros, 137 Pyrobitumen, 81, 85
Quarries, 46, 70-73
Quarter-obol, as a unit of weight, 55,
153-55
Quartz: 76, 97-98, 108, 121-22, 132, 134; green, 97, 120; purple, 121-22; red, 122-23; rose, 108; staining of, 98
Quicklime: called gypsos, 210, 220-21; mortar made from, 215-16; prepared from marble, 60, 78, 220; used for neutralizing wine, 216-17
Quicksilver, 58, 203-205
Ragusa, deposits of rock asphalt at, 85 Reagents, modern use of, in assaying gold
or silver alloys, 151-52, 155-56 Realgar: 53, 56, 171-72; decomposed, 166;
ironlike, 166 Recipes: for imitating precious stones, 98;
for solders for gold, to6; for whitening
copper, 166 Red felsite, 139 Red lead, 189
Red ochre, 53, 56-57, 172-73, 175-83 Red Sea (meaning the Persian Gulf), 53,
134-35
Resin, fossil, 112-13
Rhyolite, 83, 84
Roasting of ochre, 182-83
Rock asphalt, 80-85
Rock crystal: 51, 76, 121; engraved, or carved into large objects, 121; imitations of other stones made from, 98
Rubrica, a red earth, 177
Ruby, 89, 90
Russia, a source of fossil ivory, 135
Salts, 207
Samian earth, 58-59, 209, 210-11, 212-13
Samos, 59, 209
Sand: 49, 57-58, 199; use of, in mortars, 215
Sandstone, 72, 79
Santorin (Thera), 93
Sappheiros, dark blue lapis lazuli sprinkled with pyrite, 46, 50, 53, 126, 136-
37 Sapphire, 136 Sapphirus, Latin name for sappheiros, 136-
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