What weight of tin could be obtained by the reduction of 1 ton of cassiterite?
"An Elementary Study of Chemistry" by William McPherson
The principal mineral of tin is cassiterite (tin oxide).
"The Economic Aspect of Geology" by C. K. Leith
Cassiterite usually occurs as veins or impregnations in granitic rocks, and is especially associated with the quartz-mica rock called greisen.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4" by Various
The granite, which is intruded through the Eocene beds, is associated with a pegmatite containing tourmaline and cassiterite.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2" by Various