went out last night to a local beach and arrived just before low tide as soon as the tide receded enough I went in to about ankle deep .the ocean at night gives me the willys :shock anyway this turned out to be my best beach hunt ever found two junk rings and one that passes the 18k acid test and gold tester machine test, sure is lite though .anyways also found a gopro buried about 1.5 feet in the wet sand , thee pairs of glasses one prescription and two sun glasses one is a pair raybans in good condition,usual coins [the felix pennies were discarded on the way out], anyway I have a question would a thick layer of plating pass the acid and machine tester test? not convinced totally on this ring .all in all a great night for me .thanks for looking.