Diamond Services
GSI does it all, from basic grading services to the most sophisticated testing and examination using advanced instruments. The lab offers sorting of melee, cut grade analysis, light analysis reports, origin testing of loose diamonds and gemstones, treatment identification, laser inscription on diamonds and gemstones, metal engraving, jewelry QC, metal inspection, and 360-degree virtual imaging on every loose diamond.
Diamond Grading
GSI is a leading global gemological laboratory with robust diamond grading services. GSI grading services offer precise and consistent grading. The grading process evaluates a diamond's key characteristics, ensuring customers have accurate and reliable information about their diamonds.
Key Features:
- Cut Grading/Light Performance Analysis: Assessment of the diamond's light performance, proportions, symmetry, and polish to determine the quality of its cut.
- Symmetry and Proportion Analysis: Detailed measurements to assess the diamond's overall symmetry and proportions.
- Color Grading: Evaluation of the diamond’s color grade based on an internationally recognized scale.
- Clarity Grading: Identification and assessment of inclusions and blemishes that affect the diamond's clarity.
- Fluorescence Evaluation: An analysis of the diamond's reaction to ultraviolet light.
- Diamond Origin Reports: Supply chain tracking can confirm the geographical origin of the diamond, enhancing its value and ensuring ethical sourcing.
Other services may be included as well. See other services for more information.
Melee Sorting
GSI provides services of sorting melee and, star melee sized loose diamonds, received in bulk and batches.
Key Features:
- Expert Sorting: Melee and star melee diamonds are sorted by experienced professionals.
- Grading Criteria: Diamonds are sorted based on criteria such as: Color, Clarity, Cut & Size.
- Detection of Lab-Grown Diamonds: GSI identifies any undisclosed lab-grown diamonds or simulants mixed in parcels.
- Ethical Practices: All services are accurate and backed by strict ethical standards.
- Loose diamonds can be sorted by minimum criteria such as:
- Natural vs laboratory-grown
- Treated vs untreated
- Color range
- Clarity range
Jewelry Grading
GSI offers full grading and gemological analysis of mounted goods, in so far as the mounting permits.
Key Features:
- Diamond Grading
- Quality Assurance
- Appraisals
- Growth Origin Detection and Screening
Quality Assurance
GSI's QA Services feature a dedicated team that thoroughly evaluates each jewelry piece, focusing on:
- QA Services:
- Metal Finish: Assessing the quality and finish of the metal.
- Diamond/Gemstone Quality: Scrutinizing the quality of diamonds and gemstones.
- Craftsmanship: Reviewing overall craftsmanship for potential defects.
- What you get:
- Detailed Report: Provides a jewelry report with a GSI QA stamp, representing top-tier excellence and alignment with your brand's commitment to quality.
Polki Jewelry Authentication
GSI offers a specialized authentication service for Polki jewelry, using advanced screening methods to accurately identify laboratory-grown diamonds and disclose any treatments or enhancements.
Key Features:
- Specialized for Polki Jewelry: Tailored specifically to this jewelry type.
- Advanced Screening Methods: Ensures accurate identification of laboratory-grown diamonds.
- Disclosure of Treatments: Any treatments or enhancements are clearly stated in the report.
Screening and detection
GSI offers screening and detection services for both mounted and loose diamonds, ensuring accurate representation of your inventory.
Key Features:
- Loose Diamond Screening: Parcels are screened, separated, and sealed based on their growth origin.
- Assurance of Authenticity: Confirming that no natural and lab-grown diamonds are unintentionally mixed.
- Jewelry Screening: Jewelry pieces are inspected, and any stones suspected of differing origin are marked for further review.
Light Performance
GSI’s light analysis service uses advanced technology to evaluate a diamond’s optical properties and light performance.
Key Features:
- Advanced Technology: Utilizes solid-state LED light sources and a high-resolution camera to capture precise light performance.
- Accurate Results: Delivers consistent, dependable results and distortion-free images.
- Showcases Key Features: Highlights the diamond’s brilliance, fire, scintillation, contrast effects, and light efficiency.
- Simple Grading Scale: Presents the diamond's light performance in an easy-to-understand grading scale.
Laser Inscription
GSI provides laser inscription services that discreetly engrave numbers, letters, or logos on a diamond’s girdle without affecting its natural beauty. These inscriptions are visible using basic gemological tools like a 10x loupe.
Key Features:
- GSI Report Number: Inscribes the diamond’s unique GSI report number, permanently registered in GSI’s archival database. This aids in:
- Identification
- Security
- Authenticity verification
- Quick retail verification, boosting consumer confidence
- Brand Identity: GSI can also engrave specific brand marks or logos on the diamond for brand recognition.