Welcome to the IGS Forums! Please note that you'll need to create an account to participate in these forums. Please read our brief Forum Rules and Etiquette.
Show More Information
Forums Home » Reply To: The classification of emeralds

Reply To: The classification of emeralds

Profile photo of dweyer


do you tested dicroism and spectra? According to Lazarelli charts dicroism of emerald is yG – BG and dicroism of aquamarine colorless/bluish – blue/skyblue. I have always problems to see the spectra, but if: Aquamarine should have a different spectrum. According to Lazarelli there is a line in 456 (and a 437 line which is not seen in heat treated samples). In Emerald there are lines in the 580 and between 600 and 700 (the exact numbers differ between IGS and Lazarelli chart).

Take your love of gemstones
To a New Level
Search in radius 25 miles

eNews Signup

Skip to toolbar