"Why, that's scheelite, Charley," replied Wiley confidentially, "and it runs about sixty per cent tungsten.
"Shadow Mountain"
Dane Coolidge
He had known it contained scheelite the moment he picked up that white rock that Virginia had placed in her collection, but naturally he had not announced it from the house-tops.
"Shadow Mountain"
Dane Coolidge
In these occurrences the tungsten mineral is almost invariably scheelite, and is associated with calcite, garnet, pyroxene, and other silicates.
"The Economic Aspect of Geology"
C. K. Leith