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Index

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INDEX.                                               83
PAGE.
Diamond reduced by cutting.........    74
„ splitting ....................    76
„ specific gravity of .........      9
,, testing for.....................    10
„ when tirst known to exist
in New South Wales ...      2
„ yellow ........................    11
„ matrix, Borneo ............    12
„            ,, Brazil ...............    12
„            „ India ...............    12
„            „ New South Wales 13, 14
,,            ,, South Africa......    11
Dichroiscope, how used ...............      9
Dichroism ................................      9
Dichroite.................................    71
Du Toit's Pan Mine, South Africa..    12
Du Toit I Diamond .....................    19
Du Toit II Diamond....................    19
Earliest record of New South
Wales Diamonds .....................      2
Electricity, how determined .........      7
Emerald...................................    29
,, ancient uses of...............    29
,, colouring matter of.........    30
,, geological formation of ...    30
,, historical .....................    29
in Peru ........................    29
,, in the New England Dis­trict ........................    30
Isle..............................    29
,, Mine of Mount Zebarah ...    30
,, mode of cutting ............    30
,, New South Wales locali­ties.........................    31
„ Oriental........................    19
value of........................    29
,, where found..............- ..    30
Engraved aquamarine __..............    28
,, garnets ...... .................    34
,, rubies ........................    22
,, sapphires .....................    24
,, topaz ...........................    39
Essonite or cinnamon stone............    35
Euclase ...................................    72
Eugenie diamond ........................    17
False topaz—yellow quartz .........    58
Feldspar adularia ........................    68
., group.............................    68
,, orthoclase .....................    68
Fire opal....................................    50
Fleche3 d'amour..........................    55
Florentine diamond .....................    17
Forms of cutting precious stones ...    74
Fossil turquois ...........................    53
Gani Mine ................................   3, 17
Garnet........................................    33
,, cleavage of........................    33
,, composition of ..................    33
„ crystalline system of...........    33
,, distinctive tests..................    34
PAG E.
Garnet, formula? of species ............    34
„ geological formation............    33
,, hardness of.......................    33
,, historical...........................    31
,, iron-alumina .................... 31, 35
,, iron-lime........................... 31, 36
,, lime-alumina.................... 34, 35
,, lime-chrome .................... 34, 36
,, lustre of...........................    33
„ magnesia-alumina............... 34, 35
,, manganese-alumina ............ 34, 36
,, mode of cutting..................    35
,, New South Wales localities    37
„ origin of name ..................    34
,, so-called "Australian rubies"    37
,, specific gravity of............    33
„ value of ...........................    37
,, various forms of..................    34
,, where found.....................    35
Gems, artificial ...........................    79
,, imitation .. ........................    79
,, paste.................................    79
,, polishing where practiced in
Europe.......................    75
Gem stones of lesser value ............    68
Gevserite ...................................    50
Golden leek................................    63
Golden stone ...........................    45
Gouttes d'eau ............................    38
Great Mogul diamond.................    17
,,              weight, before and
after cutting...    17
,,              where found ......    17
Green garnets..............................    36
,, glass as emerald..................    30
,, sapphire ...........................    25
,, spinel .............................    31
,, stone.................................    69
,, stone, uses of.....................    69
,, zircon ..............................    42
Grossularite.................................    35
,,         composition of ............    35
,,         where found ...............    35
Hardness....................................      4
,, scale of .......................      4
Hecatolite ........ ........................    GS
Heliotrope .................................    64
,,          engraved....................    64
,,          tradition in reference to    64
,,         uses of........................    64
,,          where found ...............    64
Hexagonal system, plate...............    26
,,               simple forms of    26
Hiddcnite ...................... .........    72
,, properties of ..................    72
,, value of ........................    72
,, where found ....... .........    72
History of large diamonds ............    16
Honduras opal ...........................    48
Hope diamond .........................    17
Hyacinth—red zircon .................    41
Hyalite ....................................    50
Hydrophone ..............................    50
Imitation gems ..........................    79
Index Page of 96 Index
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