Engagement rings, diamonds, and fine jewelry are both financial and emotional investments, and St. John’s Jewelers recommends insurance coverage in case of damage, theft or loss. However, if you are just interested in the estimated price of an item that you own, we can advise you on the approximate value of your item as a free service to our customers. All appraisals and estimates are done in-house by the owner and Gemologist, Linda Miller, who graduated from the Gemological Institute of America (GIA).