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INDEX
111
PAGE
Koh-i-nur ......... 64
Lapis-lazuli ......... 103
Light, physical properties of . . . . .26
Lime-alumina garnets ....... 102
„ ,, cinnamon stone .... 102
,. romanzovite ..... 102
., ., succinite ...... 102
Lime-chrome garnets . . ... 101, 102
., .. uwarowite . .... 101.102
Lime-iron garnets . . . . . . . .101
,. aplome ....... 101
., ,. pyreneite . . . . . .101
,. ., topazolite . . . . . .101
List of stones according to colour .... 75-71
„ .. hardness .... 39-41
specific gravity . . . 48-50
Lustre....... . . 26, 28
Lustreless, definition of ...... . 20
Lynx-eye stones ........ 87
Magxesia-alumina garnets ..... 102, 103 ,. „ carbuncle, or anthrax . .102
noble.....103
,, ,. pyrope ..... 102
Magnetic and electric influences . . . . 57-61
Malachite.........11
Manganese-alumina garnets ...... 103
spessartine, or spessartite . . 103
Masculine stones ........ 85
Melanite.........101
Menilife (opal) ........ 36
Metallic-lustre stones ...... 28, 29
Mohs's table of hardness ...... 39-41
Noble garnet ......... 103
or precious opal ....... 35
Non-diaphanous stones ....... 28
Odontolite . . . . . . . . .106
Olivine corundum (see "Chrysolite"). .... 85
Opal..........11
.. varieties of ...... . 35, 36
Opalescence (not to be confused with " Change of Colour"
and " Play of Colour," which see ; see also " Fire") 36, 37
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