wolframite - found in china, rwanda, russia (generative ai)

iron rock art jewellery black sculpture ice metal snow water winter white monochrome leaf flower freezing wolframite found china rwanda russia manganese tungsten oxide mineral used source alloys generative mineral minerals raw ore rock igneous metamorphic sedimentary metallic deposit deposits oxide jewelry color colors crystal structures properties rocks alloys metal metals earth precious malleable rarity beauty veins abundant mined underground riches treasure wealth ai iron wolframite manganese