Quality Assurance
“Experts in Identification and Grading of Colored stones and Diamonds”
IIDG certifies the greatest range of gemstones and jewelry.
As the industry pioneer in jewelry evaluation, we have unmatched expertise and a global footprint. We are renowned for grading colourful gemstones, diamonds, pearls, fine jewelry, and all contemporary synthetics and simulants. We also have a solid reputation for grading diamonds.
IIDG reports are regarded as a reliable source for determining authenticity and quality since they are tested in our world-class laboratory.
Uncut Diamond/Jewellery Quality Assurance Check List
- Identification of Stone
- Disclosure of imitation stones
- Disclosure of synthetic stones
- Colour variation in coloured gemstones
- Missing stones if any
- Broken gemstones
- Unfinished prongs
- Under sized gemstones
- Soldering defects
- Mishappen gemstones
- Rods/Balls polishing
- Gap between prongs
- Back/Lock screws checking
- Cracks if any
- Metal porosity
- Loose setting