Matching zirconia veneers beside existing E.max restorations is not a simple A1-to-A1 shade exercise. Zirconia (ZrO₂) and lithium disilicate (Li₂Si₂O₅) transmit, scatter, and mask light differently. Here is how clinicians and laboratories can control value, translucency, ceramic thickness, cement shade, texture, and photography before the mismatch reaches the patient.