Plastic, model, acrylic, rubber, metal, wood ... However, certain sensitive plastics that experience slight surface crazing or whitening when contacting with the adhesive can cause a cosmetic issue ...

Look for the presence of matrix, crazing, pits, etc. Evaluate the opal’s cut: Consider the opal’s symmetry, thickness, polish, sizing and calibration. Opal hues can range across the spectrum. An opal ...