This mid century modern necklace is likely from about 1950's or 1960's. Based on the design I would lean more towards the 1960's. The rhinestones are in quite good condition for its age! The color of the dark green stones is darker than peridot but lighter than an emerald green. The closest gem color they would be similar would be chrome diopside. The back of the necklace is clean but does have a bit of patina happening which is consistent with its age. The fish hook clasp used to fasten the necklace hooks onto the rhinestone that is the length you would desire. It has patina brass look now from its age. Still in great working order! Please review all of the photos and video for condition. 15" when measure from end to end it is considered a choker length. Please check out my closet for pieces to go with! To pay only one shipping costs on multiple listings from my closet simply create a bundle prior to checking out! I do entertain reasonable offers particularly on bundles so please feel free to send them in! New To Postmark? Use referral code STYLE_GARDEN when you create your account to get a $10 credit with your first purchase! (Only valid while Postmark is offering this incentive)