How do you know if a vase is valuable?

To know if a vase is valuable, conduct online research. Examine the vase for a maker's stamp, tag or label, and then use trusted online resources to identify where it was produced. From there, you can look into how much similar pieces have sold for in the past. Alternatively, you can take your vase to a certified appraiser or knowledgeable antiques dealer for an appraisal. Shop a diverse assortment of vases on 1stDibs.