This treasure is stunning and made by A. Cazares who is a noted Maestro by Hougart in THE LITTLE BOOK OF MEXICAN SILVER TRADE AND HALLMARKS. The stone is gorgous with no chips or cracks and measures 22mm X18mm. It is an old hand cut stone that I love to see. The weight is 81 grams. This necklace is beautiful and comfortable on with a wearable length of approximately 18in. The pectoral is 3.5in. without the stone drop. The widest point on the piece is 1 3/8in. and the chain is quality with rivots and is a half inch wide. This is collector/museum quality. Just, LOOK AT THAT NECKLACE!