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Laser beam refraction and reflection in different gems (crystals). DO NOT REPEAT THIS EXPERIMENT!
Red Laser refracted
How To Identify a Gemstone using a refractometer
Laser Reflection Refraction LASER POINTER EXPERIMENTS
How To Spot A Diamond - Tips & Tricks to Identify Gems
Iridescence: Nature's Most Beautiful Physics Trick
Laser through sugar crystals
35th Jenkin lecture: preliminary lecture with Dr Patrick Salter
Making Cold Light From Crystals
UV light passes through thick glass and causes fluorescence in diamonds indoors.
LASER shining through Waterford crystal and other materials.
How to Tell If a Diamond is REAL or FAKE using the DOT TEST
