Vintage Sterling/Copper Malachite Cuff bracelet

Vintage Sterling/Copper Malachite Cuff bracelet. Very cool handmade cuff in like new condition. It has JLF Artisans makers mark and sterling. I believe it was made in 1978 and never worn as I bought a few of these all different and one had a 78 scratched on it under the mark. I came across a collection of these (about 4-5 cuffs all different) from the same artisan, all unworn, all great.