I have never seen a Victorian piece with Malachite stones. This is a lovely set with a brooch and matching earrings. The brooch and earrings are not hallmarked, and tested for 9K gold. The brooch has a bead design with 2 small chains that hold 2 Malachite balls that dangle. There is a malachite bar across the top. The malachite stones have lovely colors of deep and lighter greens. There is the original old C clasp, and a small loop at the top, which might have been for a safety pin. The old C clasp works fine. The brooch measures 1 1/2" and the drops hang about 1 1/2". There is some discoloration to the metal with age. The earrings have the same design, with the same Malachite stones. They have new gold filled wires. These hang 1 1/4" from the ear. I would date this fine Victorian set at c1850's-70's.