I'll wear anything I want at anytime but I don't often wear gems, crustaceans or stones on a daily basis. However, I'm wearing a single ruby stud in one ear and a white pearl in other today so sometimes I do. I'll wear whatever rings on whichever hand and fingers too. No rules.
I wear my mothers' pearls ar just pearls to remind me of her. All my pearls came from her anyway, I've never bought any.
Pearls were considered unlucky for anyone that wasn't born in June/under the sign of Cancer (crab) - like my mother, because they were supposedly tears (and many natural drop pearls look tear-shape).
For brides, they have been considered 'future tears' if worn, but also lucky (the pearls cry for you to save you from tears).
Actually, I think the superstition came from the hazardous collection of sea, lake or river pearls. many divers (Pearlers) died or went blind due to the depths they had to go to (decompression sickness) even if they did not outrightly drown.
Opals are considered apparently unlucky for anyone who's not an October baby. This is really because opals are a generally softer stone (4.5-6.5) and after sliced into doublets and triplets to let the light through. Peridots and emeralds are often considered unlucky for the same reason.
Having any stone that doesn't match your birthstone is supposed to not so great. In ME, India and Pakistan there is a whole thing of a person matching their stone to the right vibration (I'm not an expert). Black and opaque stones are hard to wear, but diamonds suit everyone (just as well, ha ha). So it isn't this or that stone is unlucky, but some stones are unlucky for most and very few are lucky (for most).
In my religion, we are supposed to be
completely non-superstitious and not wear any good luck charms, amulets at all, but in reality in my culture, it's actually opposite. We often wear protection of a hand, something blue or an eye to ward off bad thoughts of others. I think that symbol goes far further back than the religion.
I notice in Italy, that the goddess Fortuna is sometimes worn around the neck, sometimes just her cornucopia. This is about trusting in fate (she's blind-folded) and believe (in what - not sure) and fortune will come (cornucopia). I was given a most beautiful 18K example by an Italian friend, passed down in her family (she only wears white metal(s)). I wear it more because I adore my friend
and to remind myself to be more generous towards others - not really for the Fortuna meaning.
In some cultures, as a woman, wearing
any jewellery that want given/bought for you is a
I have been given plenty, but I have to buy my own mostly, which is unlucky in itself
.