221 
Florentine mosaic of marble, malachite, etc., representing 
Fall of Rome. 
Case 2.— Engraved diamond bust of King William II. of 
Holland, executed by DeVrees, of Amsterdam, which required all 
of his spare time for five years. Was shown in 1878, at the Paris 
Exposition. 
A diamond crystal adhering to common boart, from Kimberly, 
South Africa. 
A model of the Dewey diamond, weight 23 carats, found in 
1855, near Manchester, Va. 
Diamond (round boart), weight 41/2 carats. This variety is 
extremely hard, shows a radiated structure if broken, and is 
peculiar to Brazil. 
Cut and uncut specimens of black diamond from Bahia, Bra- 
zil, South America. 
A collection of over fifty diamonds in their natural state, and 
a crystal in matrix from South Africa. 
Gem gravel containing ruby, sapphire, zircon, tourmaline, 
quartz, etc., from a Ceylon river bed. 
A collection of fifteen rubies, from Ural mountains. North 
Carolina and Georgia. 
Cut and uncut specimens of various colored sapphires, found 
on the banks of the Missouri river sixteen miles from Helena, 
Mont. 
Uncut specimens of sapphires from Ceylon, Siam, India, and 
Asiatic Russia. 
Richly colored chrysoberyls and alexandrite, from Ceylon and 
the Ural mountains. 
Six star sapphires, from Ceylon, the largest of which weighs 
134 karats. 
A ninety-nine and a sixty-six karat yellow sapphire (oriental 
topaz), a fifty-nine karat blue sapphire, also yellow, pink, white, 
and other colored sapphires. Spinels, fine red, blue and other 
colors. 
The Chilton doubly-terminated emerald crystal in a matrix 
of black limestone, from U. S. Colombia. 
