This is so subtly geeky, and looks pretty! I wonder how many people would figure it out. COATT designs necklaces, each spelling out a word in morse code.
This one is “lucky“:
And this one is the obvious “sos“:
My favourites are the above two necklaces (I would so love to have the sos one in silver), but they also do more designs like “love”, “friend” and “peace”. Most of the necklaces cost $36, but it depends on the amount of bits used (the above ones all cost $36). You can also get a custom name one for $56.