Off-White Unglazed Porcelain Streak Plate for Rock and Specimen Testing

This Eisco Labs Streak Plate is a single unglazed porcelain tile in an off-white color, measuring 1.9" (50mm) square and 0.2" in height. Unglazed porcelain provides the slightly abrasive surface needed to produce a powder streak when a mineral specimen is dragged across it. Streak testing reveals a mineral’s true color in powite form, which can differ significantly from its external appearance. This makes the streak plate an essential tool for mineral identification in geology classrooms. Suitable for earth science courses, rock and mineral labs, and field identification exercises.