About Lab-Grown Diamond

About Lab-grown Diamond

C.H. adheres to the globally recognized 4C standards

insisting on using lab-grown diamonds of F/VS grade or higher.

For diamonds above 0.30 carats, an IGI certificate is provided.

About Lab-grown Diamond

C.H. adheres to the globally recognized 4C standards

insisting on using lab-grown diamonds of F/VS grade or higher.

For diamonds above 0.30 carats, an IGI certificate is provided.

Lab-Grown Diamond

Lab-grown diamonds are cultivated in a laboratory environment.

Created by replicating the natural formation process of diamonds,
they are crystallized under precisely controlled conditions using advanced technology.

Blending scientific innovation with artisanal aesthetics,
they reveal the same pure and brilliant radiance as natural diamonds.

– Technology and the Beauty of Purity –

• HPHT (High Pressure High Temperature) Method •
Recreates the extreme high-pressure and high-temperature conditions deep within the Earth, allowing diamond crystals to form.

• CVD (Chemical Vapor Deposition) Method •
Uses carbon-rich gases to deposit layer by layer, enabling diamonds to grow gradually in a controlled environment.

– Precision and Sustainability –
• Identical to natural diamonds in chemical and physical properties
• Controlled growth process allowing adjustments in size, clarity, and color
• Lower environmental impact — a more sustainable and cost-effective choice

– Modern Values –
Lab-grown diamonds symbolize innovation, rationality, and a contemporary spirit.

More than a gemstone choice, they represent a commitment to a sustainable future.

✨ C.H. carefully selects high-quality lab-grown diamonds, offering you a more diverse and brilliant selection. ✨

IGI International Certification

Certified by the International Gemological Institute (IGI)

Each diamond is evaluated and analyzed according to the 4C standards:
– Carat、Color、Clarity、Cut–

IGI certification includes not only the 4C grading

but also detailed information such as diamond shape, measurements, symmetry, and other essential characteristics —

providing a comprehensive diamond profile.

CARAT

【C.H. offers a variety of carat options】

Carat (ct) is the unit of weight used to measure diamonds and gemstones.

C.H. Jewelry GIA-certified for diamonds 0.3ct and above

At C.H. Jewelry, we offer a variety of carat sizes of diamonds to meet our customers' needs.

．COLOR．

【C.H. uses diamonds of F (colorless) grade or higher】

The color grade of lab-grown diamonds is evaluated under standardized observation conditions.

The diamond color is categorized into five grades from D to Z.

Diamond Color Grades：
．Colorless : D・E・F
．Near Colorless : G・H・I・J
．Faint Yellow : K・L・M
．Light Yellow : N ～ R
．Yellow : S ～ Z

The color of a diamond is distinguishable to the naked eye and is an important factor affecting its brilliance and beauty within the 4C grading system.

✨ C.H. Jewelry carefully selects only lab-grown diamonds with F grade (colorless) or above for their superior brilliance. ✨

．CLARITY．

【C.H. uses diamonds of VS (Very Slightly Included) grade or higher】

Clarity is a standard used to evaluate the presence of inclusions (internal flaws) and surface blemishes in a diamond, assessed through professional examination with a 10x magnifying loupe.

Clarity Grading Scale (GIA)

FL (Flawless): No inclusions or blemishes (extremely rare)

IF (Internally Flawless): No internal inclusions (extremely high quality)

VVS1 / VVS2 (Very Very Slightly Included): Very fine inclusions

VS1 / VS2 (Very Slightly Included): Very small inclusions (almost invisible to the naked eye)

SI1 / SI2 (Slightly Included): Inclusions visible under magnification

I1 / I2 / I3 (Included): Inclusions clearly visible to the naked eye

At C.H., we only use carefully selected diamonds of VS grade or above.
Diamonds with a VS (Very Slightly Included) grade or higher have minimal inclusions visible to the naked eye, offering high transparency and beautiful brilliance.

✨ C.H. carefully select diamonds with high-quality clarity to deliver a special brilliance. ✨

．CUT．

【C.H. uses diamonds of VG (Very Good) grade or higher】

Cut is the most important factor that determines the beauty and value of lab-grown diamonds.

The quality of the cut includes the following elements

Precision of the cut －balance of proportions
Polish－smoothness of the surface
Symmetry－alignment of facets
Proportions－efficiency of light reflection

Cut Grade Classification －GIA Standard

Excellent: Maximum brilliance and reflection
Very Good: Excellent brilliance with almost perfect cut
Good: Proper brilliance and reflection
Fair: Slightly insufficient light reflection
Poor: Lack of brilliance, limited light reflection

✨ C.H. Jewelry carefully selects lab-grown diamonds with a cut grade of VG (Very Good) or above to maximize the brilliance of the diamonds. ✨

About Lab-grown Diamond

Lab-Grown Diamond

IGI International Certification

CARAT

【C.H. offers a variety of carat options】

C.H. Jewelry GIA-certified for diamonds 0.3ct and above

．COLOR．

【C.H. uses diamonds of F (colorless) grade or higher】

．CLARITY．

【C.H. uses diamonds of VS (Very Slightly Included) grade or higher】

．CUT．

【C.H. uses diamonds of VG (Very Good) grade or higher】

FAQ

What's lab-grown diamond?

What are the main differences between natural diamonds and lab-grown diamonds

Is Lab-grown diamond a real diamond?

Do lab-grown diamonds also come with certificates?

What is IGI?

Do lab-grown diamonds hold their value?

How to care for and protect lab-grown diamonds?