3 ^ 
CASE 13. — A collection of natural and polished specimens 
of agatized wood from Arizona. 
CASE 14.— A large display of the beautiful rubellite in lepido- 
lite from San Diego County, California, and some massive gyps- 
um crystals from a cave in Wayne County, Utah. These crystals 
are of remarkable size, some being nearly four feet in length, 
and they are nearly transparent. 
CASE 17A. — Collection of pseudomorphs, which illustrate 
the way in which one mineral may imitate or replace another. 
CASES 17B AND C. — Series illustrating the physical prop- 
erties of minerals, such as form, structure, diaphaneity, lustre, 
hardness, and specific gravity. 
CASES 17D, E, AND F. — A series of crystal models, rep- 
resenting the typical forms and position of the axes in the six 
systems of crystallization. Together with these are a number 
of models of crystals of the more common mineral species, and 
some of the crystals themselves. The models are mounted in 
their true crystallographic position, and are intended to illus- 
trate the crystal forms which characterize the common minerals. 
CASE 17G. — ^A series of models of gold nuggets of remark- 
able size. 
CASES 18 AND 19. — Crystals of fluorite and quartz of e5c- 
ceptional size and beauty, from various localities. 
CASE 21. — Group of amethyst crystals from Thunder Bay, 
Lake Superior. 
CASE 22. — Slab of lapis lazuli from Peru, probably the 
largest single block ever quarried. 
FLOOR CASES. — Cut gems and ornamental stones. About 
200 specimens of cut topaz, amethyst, emerald, tourmaline, 
moonstone, rock crystal, amber, alabaster, etc., are shown. The 
specimen of carved amber is a remarkable piece of lapidist’s 
work. Series of jasper trays and vases from the Urals. Ob- 
jects of polished serpentine and onyx. 
Chalmers’ Crystal Collection. This includes about 250 
specimens of crystals from United States’ localities illustrating 
varieties of crystal form and habit. It is the most complete 
and choicest collection of the kind ever made. 
