Georgian era malachite and gold convertible necklace.  This set converts from one long necklace into two bracelets and a short necklace or one bracelet and a mid-length necklace.

In 18k gold cannetille work setting. Both bracelets and necklace have hidden push clasps. European in origin. Circa 1830.

Bracelets 7.50" in length x 0.25" in width. Short Necklace measures 17.50" in length. Full length the necklace measures 32.5" long. 

Malachite panels range 0.75" wide to 0.25".