Thokcha

Thokcha ({bo|t=ཐོག་ལྕགས|w=thog lcags}; also alternatively {bo|t=གནམ་ལྕགས|w=gnam lcags}) `sky-iron` are tektites and meteorites which are often high in iron content, refer iron meteorite. The usage of meteoric iron is common in the history of ferrous metallurgy. Historically, thokchas were held in esteem for sacred.....
Found on http://en.wikipedia.org/wiki/Thokcha
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