barytes scratches easily with the knife, and from its great specific gravity is often called heavy-spar.
"Geology"
James Geikie
Many of these bodies occur as vein-stones; such as silex, carbonate of lime, sulphur, fluor-spar, sulphate of barytes, magnesia, oxide of iron, and others.
"The Student's Elements of Geology"
Sir Charles Lyell
Among these are gold, silver, copper, lead, iron, mica, corundum, graphite, manganese, kaolin, mill-stone grits, marble, barytes, oil shale, buhrstones, roofing slate, etc.
"School History of North Carolina"
John W. Moore