Onyx is known to separate. It can help release negative emotions such as sorrow and grief. It is used to end unhappy or bothersome relationships. Onyx guards against negativity. Onyx jewelry is worn to defend against negativity that is directed at you. Black stones have protective energies in the sense that black is the absence of light, and therefore, can be used to create invisibility.
This gorgeous sterling silver and onyx cuff bracelet is an excellent example of Mexican craftsmanship, circa 1980. The gracefully shaped cuff band is adorned with a large, slightly rectangular shaped onyx slab measuring one inch in length. The bracelet has an inside measurement of 7 1/2" with some additional flexibility. The cuff band measures 5/16" to 3/4" in width and the piece is stamped "Mexico - 925 - TB-21". Wonderful vintage condition.
Circa 1979 a new letter/number mark to indicate the silversmith and sterling standard was introduced in Mexico. The first letter indicates the city/area location "T". The second letter is the first initial of the last name of the silversmith (B). The last number(s) indicates that he is the 21st silversmith with a last name beginning with that letter to register at the city assay office