Видео ютуба по тегу Peter Yantzer

The Importance of a Diamond Grading Report.mov
The Importance of a Diamond Grading Report.mov
A Diamond's 4 Cs.mov
A Diamond's 4 Cs.mov
Peter Yantzer talks about diamond pricing
Peter Yantzer talks about diamond pricing
Peter Yantzer Scintillation and virutal facets
Peter Yantzer Scintillation and virutal facets
Peter Yantzer Improving diamond beauty
Peter Yantzer Improving diamond beauty