black tin
Noun
Meaning
black tin (uncountable)
(mining, mineralogy) Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand.
Noun
black tin (uncountable)
(mining, mineralogy) Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand.