Unique man's ring beautifully created in .925 sterling silver, genuine green onyx stone and 16 grams in weight. Size 12. This is a classic design that any man would love. Hand made in Taxco Guerrero Mexico. Taxco is a beautiful town located in the mountains of the west coast of Mexico and known as the silver capital of Mexico. Artisans from Taxco are world famous for their handcrafted jewelry.