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Mar. Limited 🔹 New Collection Discount NT$250 🔹 Spend NT$16,000 or more and get NT$500

Free Worldwide Shipping 🌍 Free Delivery on Orders Over USD$500

Become a VIP/VVIP for up to 10% off all items year-round 💎

Mar. Limited 🔹 New Collection Discount NT$250 🔹 Spend NT$16,000 or more and get NT$500

Free Worldwide Shipping 🌍 Free Delivery on Orders Over USD$500

Become a VIP/VVIP for up to 10% off all items year-round 💎

Mar. Limited 🔹 New Collection Discount NT$250 🔹 Spend NT$16,000 or more and get NT$500

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.

🔹 What is a Lab-Grown Diamond?
Lab-grown diamonds are artificially created in laboratories.

They replicate the natural diamond formation process using the following techniques:

✔ HPHT (High Pressure High Temperature): Recreates Earth's deep high-temperature and high-pressure environment to form diamonds.
✔ CVD (Chemical Vapor Deposition): Uses carbon gas to grow diamonds layer by layer.

 
🔹 Features of Lab-Grown Diamonds
✔ Identical chemical and physical properties as natural diamonds
✔ Controlled growth allows for customization in size, clarity, and color
✔ Lower environmental impact, making it a sustainable and economical choice

 

✨ C.H. offers carefully selected high-quality lab-grown diamonds, giving you more options! ✨

IGI International Certification

The IGI International Certification refers to the certification issued by the International Gemological Institute (IGI). This document provides a detailed assessment of a diamond or gemstone's 4Cs (carat weight, color, clarity, and cut), ensuring its quality and authenticity. IGI is one of the most recognized institutions worldwide for gem grading and certification.

🔹 Features of IGI Certification
✔ 4C grading evaluation (Carat / Color / Clarity / Cut)
✔ Detailed report on diamond shape, size, symmetry, and more
✔ Provides a comprehensive quality assessment of the diamond

 
🔹 C.H. Lab-Grown Diamond Standards
Our lab-grown diamonds meet the following strict 4C criteria:

• Carat: 0.10ct and above
• Color: D–F (colorless grade)
• Clarity: VS1 and above (only minor inclusions)
• Cut: Very Good and above (exceptional brilliance)

 

✨ For other lab-grown diamond grades or colors, feel free to contact us! ✨

CARAT

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

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

 

🔹 Popular Carat 

The most popular diamond are:

✨ 0.30ct / 0.50ct / 1.00ct ✨

 

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.

 

🔹 Diamond Color Grade Classification (D–Z)

1️⃣ Colorless: D, E, F
2️⃣ Near Colorless: G, H, I, J
3️⃣ Faint Yellow: K, L, M
4️⃣ Very Light Yellow: N–R
5️⃣ Light Yellow: S–Z

 

🔹 Why Color Matters

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】

What is Clarity?

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)

1️⃣ FL (Flawless): No inclusions or blemishes (extremely rare)
2️⃣ IF (Internally Flawless): No internal inclusions (extremely high quality)
3️⃣ VVS1 / VVS2 (Very Very Slightly Included): Very fine inclusions
4️⃣ VS1 / VS2 (Very Slightly Included): Very small inclusions (almost invisible to the naked eye)
5️⃣ SI1 / SI2 (Slightly Included): Inclusions visible under magnification
6️⃣ I1 / I2 / I3 (Included): Inclusions clearly visible to the naked eye

 

✨ C.H. Jewelry carefully selects diamonds with a clarity grade of VS (Very Slightly Included) or above to maintain beautiful transparency. ✨

CUT

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

What is Cut?

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)

1️⃣ Excellent: Maximum brilliance and reflection
2️⃣ Very Good: Excellent brilliance with almost perfect cut
3️⃣ Good: Proper brilliance and reflection
4️⃣ Fair: Slightly insufficient light reflection
5️⃣ 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. ✨

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?