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MINERALS 117 
and uncut material, the former is arranged around the latter, in the 
center of the cases, and the visitor may thus observe the brilliancy of 
effect produced in the natural mineral by skillful artificial treatment 
(cutting). 
A partial gradation in importance and value is obtained by the 
arrangement of the gems, beginning with Diamond at the extreme south 
and passing north, cases by case (through Corundum (Sapphire), Beryl 
(Emerald), Topaz, Tourmaline, Chrysolite, Spinel, Zircon (Hyacinth), 
Chrysolite (Peridot), Adularia (Moonstone), Opal, Amethyst, Kunzite, 
Amber, Pearls). In one case a varied collection of semi-precious or 
ornamental stones is shown, many of which are experimental efforts 
to use mineral material which can never have any very extended use, 
viz., prehnite, titanite, sphalerite, hematite, cyanite, etc., ete. 
SOUTHWEST WING 
MINERALS 
Next beyond the Gem Hall is the Southwest Wing or Hall of Minerals. 
At the entrance to the hall is the case in which recent acquisitions are 
placed. The general collection of minerals consists 
a. chiefly of the well-known Bement Collection which con- 
of Minerals  t@/NS specimens representing species of the known minerals 
of the world. Not only is the collection noted for its 
numbers, but in many instances the beauty and size of the individual 
specimens are quite unsurpassed in other collections. 
Many attractive specimens are displayed in cases arranged down 
the center of the room. The remainder of the collection is arranged 
according the classification of minerals. In the first cases on the right or 
left are models of the six systems of crystals and other introductory 
illustrations of the physical and optical properties of minerals. Each 
mineral has a characteristic form of crystallization which is one of the 
means of identifying it. The distribution of the more important 
minerals is indicated on maps. 
SOUTHWEST PAVILION 
COLLECTIONS FROM THE PACIFIC ISLANDS 
On entering the Southwest Pavilion beyond the Hall of Minerals 
the visitor faces groups representing the natives of the Pacific Islands. 
Directly in front is a Tahitian priest taking part in the fire-walking 
ceremony, in which the participants walk over heated boulders of lava. 
