. Bulletin - United States National Museum. Science. showing divergent emerald-green transparent prisms in cavities in limonite furnished measurable crystals, which supplied the data for the drawing, Figure 70. The prisms present the usual habit, elon- gated in the vertical direction and invariably twinned on the front pinacoid a(100). These are always developed with the reentrant angle up, as shown in the figure. The angles of the forms present, a(100), 6(010), m(110), and c(001), agree well with the calculated values. The prism zone is deeply striated vertically. LATAH COUNTY In the Hoodoo d
. Bulletin - United States National Museum. Science. showing divergent emerald-green transparent prisms in cavities in limonite furnished measurable crystals, which supplied the data for the drawing, Figure 70. The prisms present the usual habit, elon- gated in the vertical direction and invariably twinned on the front pinacoid a(100). These are always developed with the reentrant angle up, as shown in the figure. The angles of the forms present, a(100), 6(010), m(110), and c(001), agree well with the calculated values. The prism zone is deeply striated vertically. LATAH COUNTY In the Hoodoo district malachite occurs as a constituent of oxidized copper ore in the Mizpah and Copper King mines. A body of good grade oxidized copper ore opened in the former property in 1917 contained abundant malachite with less azurite, native copper, cuprite, and copper pitch ore. u LEMHI COUNTY In Lemhi County malachite is mentioned from a large number of mines,75 although no striking speci- mens of the mineral have been seen from the county. In the Blue Wing district malachite occurs locally in the oxidized ores along with other oxida- tion products of chalcopyrite in the veins which produce hubnerite ores. In the McDevitt district much malachite occurs, with a little azurite as an oxidation derivative of bornite near the surface in the Copper Queen mine. In the Carmen Creek district malachite occurs in similar association and similarly in the Queen of the Hills, John Torney, and other mines of the Eureka district and in the Blackbird district. LEWIS COUNTY Malachite occurs in oxidized ore of the Horseman property in the Deer Creek SHOSHONE COUNTY In Shoshone County malachite is found in numerous places in the Coeur d'Alene and tributary districts. In the southern copper area malachite occurs in limonite in the Monitor, Richmond, and other mines. In the Snowstorm mine malachite was found in much of the oxidized ore as an impregnation in quartzite, but was probably much l
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