• WordNet 3.6
    • n cassiterite a hard heavy dark mineral that is the chief source of tin
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Webster's Revised Unabridged Dictionary
    • n Cassiterite (Min) Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; also massive, sometimes in compact forms with concentric fibrous structure resembling wood (wood tin), also in rolled fragments or pebbly (Stream tin). It is the chief source of metallic tin. See Black tin, under Black.
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Century Dictionary and Cyclopedia
    • n cassiterite Native tin dioxid, SnO2, a mineral crystallizing in tetragonal forms, usually of a brown to black color, and having a splendent adamantine luster on the crystalline faces. Its specific gravity is very high, nearly equal to that of metallic iron; it generally occurs in irregular masses and grains, disseminated in granite, gneiss, clay slate, mica slate, and porphyry; also in reniform shapes with fibrous radiated structure (wood-tin), and in rolled pieces or grains, as sand, in which last condition it is known as stream-tin. It is the principal source of metallic tin, occurring in many localities, the most important of which are Cornwall in England, the Erzgebirge in Saxony and Bohemia, Finland, the island of Banca near Sumatra, and Queensland in Australia. It has recently been found in some quantity in Dakota. The supply at present is chiefly drawn from Australia.
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Chambers's Twentieth Century Dictionary
    • n Cassiterite ka-sit′e-rīt a brown native tin dioxide.
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Webster's Revised Unabridged Dictionary
Gr. tin
Chambers's Twentieth Century Dictionary
L. cassiterum—Gr. kassiteros, tin.


In literature:

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