32 Tht American Geologist. July, U94 
truncated by the faces of the icosatetrahedron. Numerous 
irregular- shaped cavities appear on the faces of the dodeca- 
hedron and are probably etchings. Mr. Devine sold the stone 
to Messrs. Tiffany & Company of New York, and I have been 
informed by Mr. George F. Kunz that it would doubtless cut 
white but would not be entirely perfect. The stone has been 
placed uncut in the "Exposition Collection" of gems prepared 
by Tiffany ct Co. Mr. Devine's farm, on which this diamond 
was found, is two miles south of the village of Oregon and 
about twelve miles south of Madison. It was found in the 
till or boulder clay of the Kettle moraine. The residue of 
this material after elutriation to free it from the more finely 
comminuted matter, is found by microscopic examination to 
be composed of rounded quartz grains of variable size with a 
few oxidized grains of pj^rite. 
Considerable interest attaches to this find when considered 
in connection with other Wisconsin finds of diamonds. In 
1876 a stone was found while digging a well on the farm then 
owned by Dr. Tucker in the town of Eagle near Waukesha.* 
In November, 1883, Mrs. Clarissa Wood sold the stone to Col. 
S. B. Boynton, a Milwaukee jeweler, for one dollar, neither 
part} 7 to the transaction knowing that the stone was a dia- 
mond. When it became known that the stone was a valuable 
diamond, suit was brought b} T Mrs. Wood against Col. Boyn- 
ton for its recovery. The case was carried to the supreme 
court of the state and decided in favor of the defendant. 
The stone is still uncut in the hands of Col. Boynton, who 
now resides in Chicago. Through his courtesy I have been 
allowed to examine it. Like the Oregon stone, this diamond 
is a rhombic dodecahedron with rounded faces. The faces 
are sometimes vicinal, indicating a hexoctahedron of irrational 
indices. The faces also occasionally exhibit peculiar circu- 
lar markings and low elongated triangular protuberances not 
altogether unlike those sometimes seen on the rhombohedral 
faces of amethyst. The crystal is but little distorted, is very 
transparent, and lias a wine } T ellow color. On one side is a 
small flaw, apparently superficial. The weight of the rough 
*Min. Res. of U. S. for 1S83 and 1S84, p. 732. (1885.) 
Cf. also Geo. F. Kunz. Gems and Precious Stones, New York. 1890, 
p. :;:>. 
