GUILD Gemstone Laboratory-GUILD-Colored Stone Report-Pearl Report-Field Expedition
GUILDGemstoneLaboratoryiscomposedofMrCharlesCarmonawasfoundedinLosAnge-lesinJuly1980.Formorethan40years,GUILDGemLabhasalwaysbeencommittedtotheresearch,identification,sciencepopularizationandpromotionofcolorgemstones,andhasrichexperienceandmassiveachievementsinthefieldofbuildingastandardizedsysteminthecolorgemmarket.