Ducado Jóias is a traditional jewellery business established in 2005, operating both a physical shop in Porto and an online store. The company specialises in buying and selling pre-owned jewellery and watchmaking items, presenting itself as a trusted destination for second-hand gold. It highlights careful handling, professional standards, attentive service and competitive prices.

Its online catalogue includes rings and sets in yellow, white and two-tone gold, as well as pieces featuring diamonds or combining gold and silver. Customers can also browse earrings, brooches and tie pins, cufflinks, necklaces and chains, pearl and diamond jewellery, crosses, medals, bars and coins, silverware, bracelets and bangles. The selection extends to pocket watches, watch chains and wristwatches in various metals, including gold.

Ducado Jóias serves customers interested in purchasing pre-owned pieces and offers a dedicated service for those wishing to sell jewellery. The Porto shop is located on Rua de Cedofeita and welcomes visitors on weekdays and Saturday mornings.