Crystals laboratories may also do the following tests:

Optical Examination: Utilizes light microscopy to assess the clarity Testing
color Testing
and imperfections within gemstones and other decorative crystals Testing
Hardness Testing: The Mohs scale of mineral hardness is employed to determine the resistance of crystals to scratching Testing
essential for gemstone grading Testing
Spectroscopy: Analyzes the light spectrum to identify the chemical composition and verify the authenticity of gemstones and crystals Testing
Electrical Testing: Measures the electrical properties of piezoelectric and semiconductor crystals Testing
critical for their use in electronic devices Testing