Nhẫn đính hôn hình chữ nhật dài, cắt kiểu đá vụn, màu vàng, đính đá zirconia khối.

Yes. Unlike generic bulk gems with irregular sizes, all CZDIA production batches go through strict multi-stage mechanical and optical dimension grading. We control size tolerances within an industrial-level ±0.01mm to ±0.02mm matrix. This strict calibration guarantees that whether you are hand-setting a custom piece or running high-volume automated CNC micro-pave casting lines, our stones will fit your mounts flawlessly without cracking or jamming.

Most commercial jewelry utilizes low-grade (1A to 3A) Cubic Zirconia, which is mass-tumbled, resulting in rounded facet edges, structural micro-cloudiness, and a dull look over time. CZDIA uses strictly uncompromised 5A (AAAAA) Grade raw crystals. Each stone is individually hand-polished by master lapidaries under optical instruments. This ensures razor-sharp facets and flawless optical clarity that perfectly mimics the exact brilliance pattern of a D-flawless mined diamond.

Absolutely. Because we supply international premium heritage brands, all CZDIA stones are engineered to endure high-temperature industrial casting. They possess exceptional thermal shock resistance and can easily withstand standard wax setting (casting-in-place) temperatures exceeding 750°C without burning, changing color, or losing their brilliant luster.

Absolutely. Because we supply international premium heritage brands, all CZDIA stones are engineered to endure high-temperature industrial casting. They possess exceptional thermal shock resistance and can easily withstand standard wax setting (casting-in-place) temperatures exceeding 750°C without burning, changing color, or losing their brilliant luster.

No, CZDIA stones are guaranteed not to fade, yellow, or turn cloudy under normal wear. Low-grade CZ absorbs microscopic oils and lacks thermal stability, causing it to go dull. Our 5A-grade stones feature a highly stabilized atomic matrix with a high hardness rating of 8.5 on the Mohs scale. They block oil absorption and remain crystal clear. If they ever appear less shiny due to daily cosmetics or lotion buildup, a simple wash with warm soapy water and a soft brush will instantly restore their original fire.

It depends entirely on your design intent. Round Cuts feature the classic 57-facet Hearts & Arrows geometry, offering the highest white-light reflection (brilliance). Fancy Cuts (like Princess, Emerald, or Heart shape) offer unique, avant-garde silhouettes for modern designer statements. At CZDIA, our Fancy Cuts carry a premium craftsmanship fee due to the significantly higher raw material clipping loss and complex manual symmetry needed to match our rigid $\pm0.02\text{mm}$ setting tolerance.