34 FIELD MUSEUM OF NATURAL HISTORY 
the name and composition of the species, the Museum catalogue 
number, and the locality. Beginning with the case of elements 
at the left of the entrance from Hall 62, an exact facsimile of the 
Cullinan diamond, the largest diamond ever found, is of interest. 
The large crystals of stibnite from Japan in the same case are 
also worthy of special note. The next wall case contains a 
remarkable specimen of millerite from Iowa, and a fine display of 
fluorite from Cumberland, England. In the floor cases in this 
group the specimens of gold, galena, pyrite, sylvanite and cer- 
argyrite are especially noteworthy. In the floor cases following, 
the series of twin quartzes from Japan, of Placerville, California 
quartzes, of golden quartz from Colorado, chalcedony from 
Wyoming, precious opal from Australia, cuprite from Arizona, 
hematite from Elba, manganite from Michigan, and rutile from 
Georgia, are noteworthy. The adjoining wall cases contain 
among other specimens a large and fine series of quartz crystals 
from several localities, also a large group of amethyst from 
Thunder Bay, and a remarkable series of agates from South 
America. Passing to the east side of the hall a series of calcites 
is shown of exceptional completeness and beauty. These in- 
clude a superb series of English calcites and large wine-colored 
calcites from Joplin, Missouri, with still larger ones of violet 
color from the same region. Other remarkable specimens of 
carbonates in the wall cases include blue smithsonite from 
Greece, aragonite from Sicily, and azurite and malachite from 
Arizona. In the floor cases containing carbonates, smaller speci- 
mens of calcites are shown, most of which are remarkable for 
their brilliancy and perfection. The rhodochrosites from Col- 
orado are of rare beauty of color. The series of cerussites is ex- 
cellent, and some remarkable azurites and malachites are shown. 
The series of silicates begins with the feldspars and is then fol- 
lowed by pyroxenes and amphiboles. A series of beryls follow- 
ing includes emeralds, aquamarines and other gem stones. The 
varieties and localities of garnet are next displayed and next a 
superb series of phenacite, dioptase and topaz. Tourmaline is 
fully represented, the best specimens being from Maine, Cali- 
fornia, and the Island of Elba. Then follow the zeolites, a group 
of hydrous silicates named from their easy fusibility before the 
blowpipe. The specimens in the adjoining wall cases contain a 
remarkable series of the richly colored amazon-stones of Colo- 
rado, garnets of large size and various coloring, large crystals of 
