Video presentations
From The Gemology Project
Demonstrations say more than a 1000 words.
- Video lecture by Professor Lewin at MIT about refraction, TIR, dispersion and color - High speed - Low speed (Realmedia format)
- Anomalous Double Refraction video (Barbra Voltaire, hosted by Google Video)
- Specific Gravity Video (Barbra Voltaire, Hosted by Google Video)