The shop Ratman started selling dirt-cheap diamonds is thriving. When Kitaro expresses his suspicions about it, Ratman refutes him and declares he's cutting ties with Kitaro. The truth is, Ratman has a secret partnership with the Wheel Monk. Ratman leads humans to the Wheel Monk where the Wheel Monk eats their spirits. When their spirits are consumed, the humans turn to diamonds. Selling those diamonds has made Ratman very rich and he's indulging himself to his heart's content. Just then, a group of humans who have lost business because of Ratman, the Diamond Syndicate, appear before him and kidnap him...!
Diamonds are unobtainable.
That's what makes them diamonds.
.الألماس بعيد المنال، هذا ما يجعلها ألماسًا
Diamanten sind Diamanten,
weil sie so selten sind.
Los diamantes son diamantes
porque no están al alcance de la mano.
C’est la rareté des diamants
qui en fait ce qu’ils sont.
Per essere ciò che sono, i diamanti
non devono essere alla portata di tutti!
Diamantes são difíceis de obter.
É o que faz deles diamantes.
Алмазы так легко не достать. 
Это и делает их алмазами.