I believe these are good quality synthetic.  The clasp is gold coloured metal.  Please see photos.

Please note I try to post as soon as possible but can only guarantee to post on the first Saturday after cleared payment.  If you require fast dispatch please contact me before buying and I will let you know what is possible that week.  I do not post overseas and the postal charges for eBay's global delivery scheme are set by and paid to eBay so please do not message me asking for differing terms.