भ्रमकं चुम्बकं चैव कर्षकं द्रावकं तथा |
एवं चतुर्विधम कान्तं रोमकान्तं च पंचमम ||
एकध्वीत्रिचतु:पन्चासर्वतोमुखामेव तत |पीतं कृष्णं तथा रक्तं त्रिवार्नाम सयाथ पृथक पृथक ||
Bramakam chumbakam chaiva karshakam dravakam tatha
evam chaturvidham kantham romakantham cha panchamam
ekadvitrichatuhpanchasarvathomukhameva tat
pitam krishnam tatha raktam trivarnam syat prithak prithak
"Magnets are of 5 varieties-Bhramakam, Chumbakam, Karshakam, Dravakam and Romakantam. They again are single-faced, double-faced, three-faced, four-faced, five-faced and multi=faced. Each is again in three colors-Yellow, black or red"
Source: Rasaarnavam, paatalah 6, adhyayah 40, slokah 21 (12th century A.D)
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