Originally a hair ornament, that has been adapted as a pendant. A beautiful and rare item from Oman. Length with dangles is 11cms. Length of circle 7cms.  Length of silver (tested) chain 30ins/76cms. 86grms total weight. Called a HALKA / HALQA One can be seen in the British Museum collection online at https://www.britishmuseum.org/collection/object/W_2009-6023-158