Mid-Century Modern Artisan Sterling Silver Brooch with Pottery Shard

Vintage Mid-Century Modern artisan made brooch. It is hallmarked with a conjoined MLT and sterling. It is I a simple abstract shape with rolled edge. Set with a shard of ancient pottery. Brooch measures 2 3/4" by 2 1/4" Weight: 28.5 grams. Nice long pin with locking clasp.