Color is only the start. Discover what truly drives colored gemstone value — from saturation and transparency to treatments, origin, and documentation — before you buy, sell, or insure.

A jewelry valuation checklist is a practical guide to the documents, photos, and context that help a professional assess your piece accurately. Clear purpose and organized paperwork reduce uncertainty, making the process more efficient and conclusions more reliable.

Cobalt blue spinel—often nicknamed “peacock blue”—is the connoisseur’s blue: poised, vivid, and quietly luminous. This collector-focused guide explains what defines the color, why it’s prized, and how to evaluate a stone with confidence when commissioning a bespoke, heirloom-quality jewel.