Kanonn's Jewelry Appraisals, Repair, and Design

Kanonn's Jewelry Appraisals, Repair, and Design operates out of the Keeling Law Firm building on Katy Freeway in Houston, run by Matthew Cooper, a GIA Graduate Gemologist and licensed bench jeweler. The business is organized around gemological services — gemstone observation, microscope and photomicroscopy work, treatment and synthetic identification, GIA diamond and colored stone grading, and gemstone origin determination — paired with hands-on jewelry repair performed on-site by a licensed bench jeweler, including a bench repair video on the site demonstrating the craft. The website emphasizes appraisal work done with "superior detail and accuracy," with Cooper also described as an expert trial witness for jewelry forensics. Clients can text photos of pieces for a repair quote or gemstone inquiry directly, a workflow that points to a personalized, appointment-based bench jeweler operation rather than a retail storefront. A portion of all sales is donated to animal rescue groups, a detail reviewers mention alongside their service experiences. Customer reviews reinforce the repair and appraisal focus: one client describes bringing in jewelry for repairs and opinions after finding consistently positive feedback online, praising Matthew's ability to explain technical gemological concepts in relatable terms. Another reviewer notes he "came up with solutions for some jewelry that I thought were lost causes," while a third describes having jewelry "beautifully repaired and untangled" and getting help verifying a Rolex purchase. For Houston clients seeking a credentialed gemologist for appraisal, authentication, or hands-on jewelry repair — especially pieces other jewelers might consider difficult — Kanonn's combination of GIA credentials and bench repair work stands out among general retail jewelers.