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तयोस् तापनम् अवध्वंसनं वा शुद्धिः ॥
These two kinds of impurities are got rid of by hammering the pieces when red hot.
english translation
स परिभाण्डे वा रूपे लवणम् उल्कया कटु शर्करया तप्तम् अवतिष्ठते ॥
In an ornament or a coin (sapari-bhánde vá rúpe) salt mixed with hard sand (katusarkará) is so heated in flame as to make it firmly adhere to (the ornament or coin).
english translation
तस्य क्वाथनं शुद्धिः ॥
This (salt and sand) can be got rid of by boiling (kváthana).
english translation
अभ्र पटलम् अष्टकेन द्वि गुण वास्तुके वा रूपे बध्यते ॥
In some pieces, mica may be firmly fixed inside by wax and covered over with a double leaf (of gold or silver).
english translation
तस्य अपिहित काचकस्य उदके निमज्जत एक देशः सीदति, पटल अन्तरेषु वा सूच्या भिद्यते ॥
When such a piece with mica or glass inside is suspended in water (udake) one of its sides dips more than the other; or when pierced by a pin, the pin goes very easily in the layers of mica in the interior (patalántareshu).
english translation