306 G. BF. Kunz— White Garnet from Wakefield, Canada. 
Art. XXXVI.—On the White Garnet form Wakefield, Canada ; 
by GeoreGE F. Kunz. 
{Read before the American Association for the Advancement of Science, at the 
Minneapolis Meeting, August, 1883.] 
Av McBride’s, Lot 7, Range 1, Township of Wakefield, 21 
miles north of Hull on the right bank of the Gatineau River, 
- Canada, there have been found some remarkable white garnets. 
This occurrence has been known to a number of collectors for 
some years, but as yet little information regarding it has been 
_ published. On visiting the locality I found that the garnets 
occur in a vein from several inches to over one foot in width in 
the crystalline magnesian limestone, and I traced the vein east 
and west a distance of over 75 feet. This vein has been fol- 
lowed to the depth of more than six feet. The crystals vary 
in size from 1™ to 80™™ in diameter and in color from color- 
less to yellow and brown; some of them are transparent 
enough to yield small gems. The brown color is very often 
the result of the oxidation of the associated pyrrhotite. The 
form is that of a dodecahedron, either alone or modified by the 
trapezohedron 2-2. 
Associated with the garnet are crystals of pyrrhotite and fine 
crystals of a white pyroxene, the adhering crystals being held 
together sufficiently by the pyroxene to form fine groups of 
this mineral when thé limestone has been removed by acid. 
Perfect isolated crystals are very uncommon. Determinations 
of the specific gravity of the mineral gave 3°6002 and 375948; 
of the Orford garnet 3°52 and 3°53. An analysis of the garnet 
by C. Bullman, Ph.B., yielded the following results: 
SUMOR Sore ieee ee Ses 38°80 
bee rhs © Weir AL Ta AN SS Closes tag at eee Allee (RES Ugur a ge 22°66 
Sesqinoxide Of tron 5c. oe 1°75 
Oxide of manpanese. “0s Se iste 
ACG oe re a oe tale 35" 
MReKONA. AST ae, Se Ce eae ae 5 ee 
99°19 
The spectroscope gave no potassium lines, soda was not de- 
termined. : F 
An analysis of white garnet from Orford, Canada, bye 
Sterry Hunt (see Geological Survey of Canada, p. 496), gave 
SiO. AlO; CaO MgO Fe0,MnO # Na,0,K.0-_ ign 
‘38°60 . 22°71 34°83 0°49 160. - 0°47 110=99°80 
bbe 
