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362
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Index
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Mocha Stone, 176
Mohs Table of Hardness,
295 Moldavite, 191 Montana Ruby, 83, 114 Moonstone, 147 Moss Agate, 176 Moss Opal, 116 Mountain Mahogany, 191 Mount a jour, 262 Mount Mica, Maine, 160 Müller's Glass, 116 Muscovite, 166
Ν
Natal stones, 234 Nephrite, 143 Nephrus amorphics, 144
Ο
Oberstein agate industry,
178 Obsidian, 190 Odontolite, 130 Oligoclase, 150 Olivines, 113, 151 Onyx, 179
------Carnelian, 180
------Chalcedony, 181
•------'Mexican, 180
Opal, 115
■------Australian, 119, 121
■-----■ Ceylonese, 150
•------Harlequin, 116
■-----Honduras, 118
------Hungarian, 118
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------ Jasp, 116
------'Moss, 116
------Noble, 117
------Oriental 118 _.
------' Precious, 117
------Wood, 116
Opalescent orthoclase-feld-
spar, 148 Opalised wood, 150 Oriental gem cutters, 198 Oxide of titanium, 192
Ρ
Paste, 210
Pavilion, 200
Pearl, 72
Pearlylite, 191
Peridot, 151, 161
------of Ceylon, 161
Phenacite, 191
Phenax, 191
Pigeon-blood rubies, 84
Pingas d'agoa, 123
Pirates succinifer, 170
Pinking, 124
Pitt (Regent) Diamond, 58, 60
Plasma, 173
Polar Star Diamond, 243
Pomegranate, 89
Precious stones, classed, 9
Premier Mines, 39
Premier Mines, new (Transvaal), 55, 56
Pseudo-nephrite, 143
Pyrite, 189, 191
Pyro-electricity, 159
Pyroxene, 156, 187
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