Shiva Purana
क्रिमिदुष्टं छिन्नभिन्नं कंटकैर्हीनमेव च । व्रणयुक्तमवृत्तं च रुद्रा क्षान्षड्विवर्जयेत् २२ ।
Six types of Rudrākṣas shall be discarded:—that which is defiled by worms, is cut and broken, has no thornlike protrusions, has cracks and is not circular.
english translation
krimiduSTaM chinnabhinnaM kaMTakairhInameva ca । vraNayuktamavRttaM ca rudrA kSAnSaDvivarjayet 22 ।
hk transliteration by Sanscript