Sarah Coventry silvertone and turqoise (?) necklace

Here's another from the 'costume jewelry bin' recently acquired -- now we're moving into the necklaces. ;-) :-) This one measures about 14-1/2" long doubled up. I do not believe it is any kind of real silver, its pair of turquoise colored decorations (5/8" across) might also be 'faux', I don't know how to really tell that either. The 'chain' that holds them consists of flat 'links' (a little less than 5/8" long) connected together with tiny rings. The small diamond shaped 'charm' affixed to its clasp seems to read "SARAH COV" with a copyright symbol.