So I think I am probably the nuttiest one of the group when it comes to the theta stuff I own....
on a day-to-day basis I have a few go-to pieces:
1) a silver intaglio (seal) ring with the coat-of arms It was probably 65 years old when I got it, and it's very subtle.. if you aren't familiar w/the coat-of-arms you'd think it was a family crest ring. If I wear gold I have a gold ring w/a coat of arms mounted on a red stone.
2) a hammered silver bracelet w/the greek letters.. again, vintage, but not so subtle
3) a (discontinued) alternating kite & pansy bracelet from James Avery (a southern jeweler). the tails of the kites curl around into a theta shape. James Avery used to make these as custom orders but they stopped their custom program. We could try to get a group order together, and perhaps they would consider making 'em again...
There's others, but these are the ones I have out on the dresser top and don't bother putting away...