



A superb vintage 1950s Los Castillo Taxco Chato design handmade sterling silver & onix negro Mexican modernist necklace - design number "42" in the onix negro (black onyx) line of jewelry.
Chato experimented all his life with different forms and techniques of stone inlay. One of his most successful was the 'onix negro' technique that was used both in jewelry and objects. I've seen it in boxes, letter openers, and some one of a kind objects that were probably special ordered, as well as extensively in jewelry of all kinds. It involves in this instance inlaying black onyx into a sterling silver frame (as in the pendant) or channel (as in the necklace links). The pendant required incredible skill to inlay the stone so seamlessly around the intricate raised silver design.
This design was also made as a brooch, earrings, a bracelet, and of course this necklace version.
Los Castillo numbered their designs, but there were many inconsistencies in the numbering system. There seems to be different numbering series for different techniques, such as the onix negro line shown here. So, design number "42" would be the 42nd design created in the onix negro line.
Many other Mexican silversmiths 'borrowed' the technique over the ensuing decades in Taxco, but none matched the technical prowess or design quality of Chato and Los Castillo in my opinion. They made it first, they made it best!