TRANSPARENCY & TRACEABILITY
Grunberger diamonds is proud to provide the highest quality natural diamonds using a legacy of experience as a fourth-generation company, the Grunberger Precision Cut, and state-of-the-art diamond testing equipment.
Professional Synthetic Diamond Tester
As a world renowned provider of melee diamonds, and as a company committed to superior service, to eliminate the risk of getting synthetic diamonds, we use synthetic diamond detection machines, such as the GLIS-3000 and the M+ Screen.
M+SCREEN
The M+SCREEN is a lab-grown diamond testing machine specifically designed for melee diamonds. It detects Chemical Vapor Deposition (CVD) Diamonds and High-Pressure High Temperature (HPHT) diamonds using short wave UV light technology.
Developed by the Antwerp Scientific Research Centre for Diamonds as a CVD diamond tester and an HPHT diamond tester, The M-Screen+ screens and sorts round, brilliant diamonds, and then automatically singles out stones that may be synthetic.
TRANSPARENCY & TRACEABILITY
GLIS-3000
Gem Luminescence Illuminating System (GLIS) is a diamond tester on lab diamonds that analyzes diamond fluorescence and phosphorescence images after ultraviolet irradiation.
The GLIS helps distinguish and locate synthetic stones by examining differences between the fluorescence and phosphorescence of natural and synthetic diamonds.
Professional skilled analysis of the data provided by this powerful synthetic diamond machine allows examination of loose and mounted diamonds.
TRANSPARENCY & TRACEABILITY
Start With Natural Diamonds, Finish With Highly Skilled Craftsmanship
When thinking of the four C’s of Diamonds (Cut, Clarity, Color, and Carat), it is important to remember a diamond’s brilliance is largely determined by its cut. Even a diamond with perfect clarity and color can appear dark with a poor cut. Choosing quality natural diamonds which have been expertly cut with perfect proportions, symmetry and which utilize the heart and arrows pattern, brings out the best a diamond has to offer.
Experience the ultimate quality and precision Grunberger Diamonds brings to the jewelry industry, as the leading expert on melee diamonds (every size ranging from 0.70mm ~ 3.70mm), by requesting a quote or opening account today.
ASSOCIATED ORGANIZATIONS
American Gem Society (AGS)
Antwerp World Diamond Centre (AWDC)
Belgian-Luxembourg Chamber of Commerce in Japan
Diamond Antwerp Bourse
Diamond Manufacturers & Importers of America (DMIA)
Gemological Institute of America (GIA)
Jewelers Board of Trade (JBT)
Manufacturing Jewelers and Suppliers of America (MJSA)
Responsible Jewellery Council (RJC) Certified Member
