Thinking Diamonds Could Cure Her Melancholia, Marla Only Set Herself Up To Become a Victim of Robbery

Here's a superstition about diamonds:

In ancient India, it was believed that diamonds would cure insanity and infections and were even injected into the bladder to break up bladder stones.  Ancient Hindus were very careful to use only the highest quality diamonds in their medical practices, as diamonds of inferior quality were thought to cause leprosy, lameness, or jaundice.