Laboratory-grown Diamonds Comparative Analysis of Portable Instruments for Screening and ID

Branko Deljanin, B.Sc., GG, FGA, DGA, DUG is President and Head Gemmologist at Canadian Gemological Laboratory, and Director of Gemmological Research Industries Inc. Vancouver (Canada). He is a research gemmologist with extensive experience in advanced testing of diamonds and gemstones and gemmology instructor in 17 countries on four continents.

[DanysOrchidsSoCA]

Very interesting topic. Unfortunately his English is horrendous and there is too much information in too little time, so it's very hard to follow and understand.

[naughtyfins]

incomprehensible. Is he late for some meeting or smth? The speed he is babling is really irritating. As if someone could simply read everything on the screen in the span of 5-10 seconds