英:['zæfə]
美:['zæfə]
英:['zæfə]
美:['zæfə]
noun
an impure cobalt oxide obtained as a dark earthy powder usually by roasting cobaltite or smaltite and used in the manufacture of smalt and as a blue ceramic color
smalt
any of various mixtures of zaffer (as with silica or iron oxide)
Italian zaffera, probably from Latin sapphirus sapphire
1 钴蓝釉