I've asked this before about whoopi's necklace she wears all the time on the view?

the only answer i got was that it was a satanic symbol. it looks like the little disk to play a 45 record on a 33 1/3 record player. this ques. is for people in there 60's and older. youngsters can answer also by asking about the speed of a record 45 or 33 1/3 or 78 please let me know---i need a good answer.