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110
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PRECIOUS STONES
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PAGE
Garnets (B) lime-iron .......101
., sub-variety aplome. .... 101
., ,. melanite .... 101
,, ,. pyreneite . . . 101
topazolite . . 101
,. (C) lime-chrome......101.102
,. sub-variety uwarowite . . 101. 102
(D) lime-alumina ...... 102
,. sub-variety cinnamon stone . . 102
,. .. romanzovite . . 102
„ .. succinite . . .102
(E) magnesia-alumina. .... 102,101
sub-variety carbuncle. or
„ " anthrax . 102. 103
noble. . . 108
,. ., pyrope . . 102
,. (F) manganese-alumina ..... 103
,, sub-variety spessartine. or
spessartite . . . 103 Girdle portion of a stone ....... 66
Oilimmering, in lustre, definition of . . . . .29
Glinting, or glistening in lustre, definition of 21
Goutte de suif-cut stones ....... 65
Great Mogul diamond ....... 64
Green stones, list of. . . . . . . .78
Groups of crystals (see '" Crystals ")
Hardness, physical properties of .... . 39
table of.......39.40.11
Heat indexes ......... 54
„ physical properties of ...... 52
Hollow-cabochon ........ 65
Hyacinth, ordinary (a form of zircon).... 85. 98
„ oriental ........ 85
Hyalite (opal) ......... 35
Hydrophane (opal) ........ 85
Imitations and tests of precious stones . . . .70 Indigo sapphires ....... 86
Ink .. ........85
Iridescence, and cause of . . . . . 37, 38
Iron-alumina garnets ........ 101
Jacinth, oriental........85
Jarcon, or jargoon ........ 98
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