This is a lovely well made necklace and earring it was made by TM 181 My "The Little Book of Mexican Silver Trade and Hallmarks" by Bille Hougart. It said that TM Hecho en Mexico 925 Metales Casados. The necklace is 17 inches long and begans with 1 /2 inch flatten sterling disk and graduates to 1 inch flatten disk. The Azurite is set in sterling. The necklace weighs 97.95g and the earrings weigh 19.14g You can see that it is fairly substantial set. A very nice Mexican Silver set.