from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See cassiterite.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The mineral cassiterite.
from the GNU version of the Collaborative International Dictionary of English
- n. Cassiterite.
from The Century Dictionary and Cyclopedia
- n. The miners' name for tin dioxid, the principal ore of tin; the cassiterite of the mineralogist.
~ Tin is found in nature chiefly as the oxide (SnO_ ), called cassiterite or tinstone.
Cornwall in England, and of the Malay Peninsula and East India Islands; in small amounts tinstone is found in many other localities.
These oxides are commonly met with in samples of wolfram and tinstone, especially niobic.
Stream tin is not pure metallic tin, but is the result of the disintegration of granitic and other rocks which contain veins of tinstone.
Of very similar origin is the "Head" of Cornwall, a surface deposit often rich in tinstone and other minerals of economic value.
Tin in the form of tinstone was mined in ancient Britain and it was a major trade item between Britain and the Greeks and Phoenicians of the Mediterranean region.
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