Cassiterite
1. Cassiterite : قلعی پتھر : (Noun) A hard heavy dark mineral that is the chief source of tin.
Atomic Number 50, Sn, Tin - a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide.
Boss, Chief, Foreman, Gaffer, Honcho - نگراں - a person who exercises control over workers; "Ask the boss".
Dark, Darkness - اندھیرا - absence of light or illumination.
Difficult, Hard - کٹھن - not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "Its just difficult".
Heavy - سنجیدہ رول - a serious (or tragic) role in a play.
Mineral - معدن سے متعلق - relating to minerals; "mineral elements".
Source - ماخذ - a document (or organization) from which information is obtained; "the reporter had two sources for the story".
Can, Tin, Tin Can - کین - airtight sealed metal container for food or drink or paint etc..