• INTRODUCING GDC

    The Gem & Diamond Certificate

  • The inspirations of GDC

    The Gem & Diamond Certificate (GDC) was inspired by a collaborative effort in the 1990s between Canada's leading testing agencies (GCAL, HKD, GS) and the University of Toronto's Materials Department. This initiative aimed to scientifically define gemstones and diamonds amid the industry's rapid growth. The project addressed two critical challenges: reducing human error in gem testing and incorporating standardized testing into the production process to enhance quality.

  • The team introduced several important concepts:

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    Standardization

    Simplifying grading by setting clear, limited standards.

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    Data

    Converting all standards into measurable data.

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    Scientific Testing

    Employing extensive equipment use to minimize human error.

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    Production Process Control

    Integrating standardization and data into the selection and processing of raw materials to ensure consistency and quality.

  • DEVELOPMENT

    The rise of artificial intelligence (AI) and lab-created diamonds. These advancements led to the concept of "Lab Intelligence Diamonds," revolutionizing the industry by redefining product standards and production methods. The "Lab Intelligence Diamond" initiative, endorsed by the Canadian government and major testing bodies, established GDC to operationalize these concepts. Moving forward, GDC plans to implement these standards globally, enhancing the connection between consumer demand and production efficiency through AI and data-driven processes.

    The approach focuses on:

    1

    Product Standardization

    Using Pantone colors and simplifying clarity levels for better consumer understanding.

    2

    Data

    Creating a clear, data-based standard system.

    3

    Scientific Testing

    Combining standardization, digitization, and AI for more reliable testing.

    4

    Production Process

    Combining standardization, digitization, and AI for more reliable testing.

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    GDC Lab-Created Diamond International Certification

  • Consumer Clarity and Satisfaction

    The standard aims to clearly and simply communicate the concept and characteristics of lab diamonds to consumers, enhancing their understanding and satisfaction.

    Production Control

    Every diamond comes from a production line, ensuring consistent control over quality, size, color, and shape

    Focus on Design Attributes

    With clarity and purity already well-managed in production, the standard now focuses more on attributes like color, cut, and shape, which offer endless possibilities for innovation. Additionally, a standard for sustainable growth is integrated into every diamond.

  • What is GDC

    GDC is a unique standard certification that has been introduced by AIDI.

    GDC valuates diamonds in 6 different aspects:

    Diamond Identification, Carat, Clarity, Shape,

     

     

     

  • Diamond

    Identification

     The physical and chemical properties are the same as natural diamond, both of which are equiaxed crystalline materials composed of carbon atoms. The Mohs hardness is 10, the density is 3.52 (±0.01) g/cm, the refractive index is 2.417, the dispersion value is 0.044, and the characteristic peak of the Raman spectrum is 1,332cm

    Carat

     Carat as a standard weight measurement, such as 0.34Carat, 2.05Carat, etc

     

  • Color

     

    Pantone color And we will continue to use Pantone color as the base to create more color standards, including multiple color lab diamonds

     

     

    Clarity

    • Grade I (VVS, diamonds have extremely small internal and external characteristics under 10x magnification);
    • Grade II (VS, diamonds have small internal and external features under 10x magnification);
    • Grade III (others, diamond exhibits distinct internal and external characteristics under 10x magnification or visible to the naked eye from the crown, diamonds have both internal and external characteristics). 

  • Shape

     

    Cutting Standard:

     

    EXCELLENT (EX) Perfect: Almost all incoming light is reflected

     

    VERY GOOD (VG) is very good: it reflects light of standard cutting grade

     

    Good (G): Reflects most of the light that enters the interior of the drill

     

    FAIR (F) is average: it can also reflect light, but its performance is average

     

    POOR (P) difference: If all cutting standards are not met, it means that the cutting is very poor

  •  

    Different Shapes

    Princess Fang

    Platform width ratio 67% -72%, full depth ratio 64% -75%, aspect ratio 1:1-1.05, no bottom tip, with 76 cutting surfaces.

    Pear shaped

    Symmetrical wings on both sides, desktop located in the center, with no defects in sharp corners, table width ratio of 53% -63%, total depth ratio of 58% -62%, aspect ratio of 1.5-1.75:1, no bottom tip, with 71 cutting surfaces.

    Radian

    Countertop ratio 60% -66%, depth ratio 59% -65%, aspect ratio 1:1, no bottom tip, with 70 cutting surfaces.

     

    Emerald

    The four corners are of the same size, with strictly parallel lines and surfaces. The platform width ratio is 61% -69%, the total depth ratio is 61% -67%, the aspect ratio is 1.3-1.5:1, the linear bottom is pointed, and it has 62-70 cutting surfaces.

     

    Heart shaped

    Table width ratio 53% -63%, full depth ratio 58% -62%, aspect ratio 0.9-1.1:1, no bottom tip, with 63 cutting surfaces.

    Horse eye

    With a width ratio of 53% -63%, a full depth ratio of 58% -63%, an aspect ratio of 1.8-2.2:1, a crown ratio of 11% -16%, symmetrical sharp angles without defects, no bottom tips, and 58 cutting surfaces.

     

    Asche

    Table width ratio 59% -65%, full depth ratio 60% -65%, aspect ratio 1-1.05:1, crown height 11-16%, with 58 cutting surfaces.

     

     

    Cushion

    Platform width ratio 58% -63%, full depth ratio 58% -66%, aspect ratio 1-1.05:1, no bottom tip, with 58 cutting surfaces.

     

    Oval shape

    Symmetrical at the shoulders, with a width to width ratio of 53% to 58%, a total depth ratio of 58% to 64%, a length to width ratio of 1.3-1.6:1, no bottom tip, and 58 cutting surfaces

     

     

    Circular

    Platform width ratio 52% -62%, full depth ratio 57.5% -63%, crown height 12.5% -17%, no bottom tip, with 58 cutting surfaces

  • Sustainable Growth

    1. The equipment required for producing and cultivating diamonds should comply with relevant international regulations, such as using efficient and energy-saving equipment to reduce energy consumption and environmental pollution.
    2. Process requirements: The production and cultivation of diamonds should comply with relevant international regulations, adopt efficient, energy-saving, green, and environmentally friendly process flow and technical parameters, and improve production efficiency and product quality.
    3. Intelligent new productivity: Green and environmentally friendly energy, ethical production processes, sustainability, the introduction of new technologies such as AI in design, production, cutting and polishing.

  • Contact

    Email:info@aidi.org

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