"Unenchanted onyx was believed to cause bad luck when worn or carried. Elminster has confirmed this suspicion." "The lesser drow deity Vhaeraun was known to occasionally send onyx to show his favour or disfavour to his followers." "Similarly, black onyx was sacred to the Chultan demigod Eshowdow, and he valued unholy items made of it." "It was a common tale that when Shar stepped on Toril, she left onyx stones as her tracks."
If you had to hazard a guess, how many pieces of onyx would say have been in been in DnD modules over the years, including official treasure tables? How many of those pieces do you think have been mentioned as fashioned into jewelry?
We're dealing with a specific setting here, however, instead of Dungeons & Dragons in general.
