| The washing of almost all this placer ore also yields a heavy schorl or wolfram and in some cases grains of tin and ironstone. |
| The same year Lodygin's electric lamps were illuminating a St Petersburg shop and he went on to patent the wolfram filament lamp. |
| It currently holds 20 concessions covering about 1000 square kilometres and produce mostly cassiterite, coltan and wolfram. |
| Karens also make their living by fishing in coastal areas, working in tin or wolfram mines, and gathering forest products like rattan and honey. |
| The base is made from the stone remains of a defunct wolfram mine and its wharf. |
| Stobart cites from the 19th century a host of ketchups including oyster, mussel, Windermere, wolfram, and pontac. |
