Gem Reports & Services
Scientific identification, grading and analytical services for diamonds, colored gemstones and crystal materials.
Diamond
Comprehensive laboratory analysis and quality assessment for diamonds, supported by modern gemological testing methods.
Colored Gemstones
Identification and analytical services for a wide range of colored gemstones, including evaluation of detectable treatments and relevant quality characteristics.
Crystal Materials
Scientific characterization and analytical services for crystalline gem materials, single crystals and other advanced crystal materials.
Identification & Grading
GIS laboratory reports are designed to provide clear, science-based information about the identity, characteristics and quality of submitted gem materials.
Identification Report
Designed to establish the identity and key gemological characteristics of a submitted gemstone or crystal material.
- Gem material identification
- Species and variety, where applicable
- Natural or laboratory-grown determination, where applicable
- Detectable treatments or enhancements
- Weight, dimensions and basic observations
- Unique GIS report number
- Online report verification
Grading Report
Combines gemstone identification with a structured assessment of relevant quality characteristics according to the type of material submitted.
- Identification information
- Color assessment
- Clarity assessment, where applicable
- Cut and proportion assessment, where applicable
- Carat weight and measurements
- Additional laboratory observations
- Online report verification
Laboratory Analysis
Modern gemological analysis combines traditional observation with instrumental techniques to investigate composition, structure and optical properties.
Spectroscopic Analysis
Spectroscopic methods support gemstone identification, characterization and the investigation of color, treatments and structural features.
Elemental Analysis
Major, minor and trace-element information provides valuable insight into gemstone chemistry, material characteristics and formation.
Crystal Characterization
Crystal structure, morphology and material properties are evaluated to support identification and scientific characterization.
Microscopic Examination
Internal and surface features are examined to evaluate inclusions, growth structures and other diagnostic characteristics.
From Submission to Verification
Each submission follows a structured laboratory process designed to support consistent, transparent and impartial reporting.
Submit
The gemstone, jewelry item or crystal material is received and registered for laboratory examination.
Analyze
Gemological and analytical testing is performed according to the material and report requirements.
Report
Laboratory observations and conclusions are documented in the corresponding GIS report.
Verify
Report information can be checked through the GIS online verification system.
Science, Precision & Integrity
Science-Based
Laboratory conclusions are based on gemological observation, analytical data and established scientific principles.
Impartial
Natural, laboratory-grown and other gem materials are evaluated according to their observable and measurable characteristics.
Transparent
GIS reports are designed to communicate laboratory findings clearly and can be verified through the online report database.
Verify a GIS Report
Enter the report number shown on your GIS document to access the corresponding online verification record.
Verify Report →