Precision-Engineered for Accurate Diamond & Gemstone Measurements – The transparent acrylic ruler features clearly marked millimeter/carat scales and shape outlines (round, princess, oval, marquise, etc.), enabling jewelers and hobbyists to measure stones with pinpoint accuracy for appraisals, settings, or custom designs. Multi-Functional Design for Versatile Use – Beyond diamonds, the ruler doubles as a guide for sizing rings, pendants, or beads, and includes reference charts for common gemstone dimensions and carat weights—streamlining workflows in jewelry making, repairs, or retail showrooms. Durable, Scratch-Resistant Acrylic Construction – Unlike flimsy plastic or paper tools, this reusable ruler resists bending, warping, and surface damage, ensuring long-lasting clarity and reliability even with frequent handling or exposure to gem-cleaning solutions. Compact & Portable for On-the-Go Use – The slim, lightweight design fits easily into toolkits, aprons, or display cases, making it ideal for trade shows, craft fairs, or in-home workshops where space is limited but precision is critical. Transparent Design for Effortless Alignment – The see-through acrylic allows users to overlay the ruler directly onto stones or settings without obstructing the view, ensuring perfect placement and reducing errors during measurement or design layout.