I recently bought this pin in Mexico City. It is actually two pins, a sword and a sheath that can be worn as one or as two separate pins. The top of the handle of the sword is a carved amethyst Aztec mask. The sheath has two cabochon amethysts. The sword is stamped on the back Sterling Mexico and the sheath just Mexico. The clasp is similar to a C-catch with no locking mechanism. The pins when put together measures 3.25" in length with a width of 1" where the sword meets the sheath. The chain measures 3.75" in length. Excellent condition. The weight is 16.86 grams.