Shiva Purana
तस्य कांतितलस्पृष्टं कांस्यं ताम्रमयं त्रपु ॥ पाषाणादिकमन्यद्वा द्रुतं भवति हाटकम् ॥ ७ ॥
Any thing made of bell-metal, copper, tin or stone touched with its brilliant surface turned into gold.
english translation
tasya kAMtitalaspRSTaM kAMsyaM tAmramayaM trapu ॥ pASANAdikamanyadvA drutaM bhavati hATakam ॥ 7 ॥
hk transliteration by Sanscript