The Red Rose mine was British Columbia's largest producer of tungsten during World War II. Scheelite occurs in a shear-zone that cuts Mesozoic Coast Range intrusives and hornfelsed tuff within 750 feet of the Rocher Deboule batholith. The minerals include scheelite, some ferberite, and, in order of abundance: quartz, orthoclase, oligoclase, apatite, biotite, hornblende, chlorite, ankeritic carbonate, chalcopyrite, and molybdenite. Cobaltian arsenopyrite, pyrrhotite, chalcopyrite, quartz, and tourmaline occur in the shear beyond the scheelite.The scheelite ore occurs in two shoots where the shear cuts a 400-foot diorite sill but is not found where the shear cuts hornfelsed tuff. The stress diagram of the vein-shear and related breaks shows that the two ore shoots pitch in the same direction as the pitch of the intersection of potential tension openings with the vein.Spectro-chemical analyses of 28 specimens of wall-rock and nearby rocks and of 14 specimens of vein- and rock-minerals showed variations of the trace elements in groups in which the range in atomic radii was within the 15 percent limit allowed by Goldschmidt in his rule for isomorphism of elements. Tungsten was absent in all the rock analyses; apparently it did not wander as a trace element into the wall-rocks.The lenticular form, coarse to pegmatitic texture, and mineralogy of the tungsten vein, imply formation at high pressure and temperature (hypothermal). As a producing property, the Red Rose is unique in a class of scheelite deposits that does not ordinarily include commercial deposits of tungsten.