NGTC Jadeite Certificate Explained: How to Verify Natural Grade-A Jadeite

When buying jadeite jewelry online, one of the most important questions is simple: how can buyers know whether the jadeite is natural and untreated?

For natural Grade-A jadeite, a gemstone certificate can give buyers a clearer foundation. It helps confirm the material, the testing result and the treatment status of the piece. This is especially important for jadeite bangles, pendants, rings and other higher-value jade jewelry.

In my shop, many jadeite pieces come with an NGTC certificate matching the exact item shown in the photos.

What Is an NGTC Jadeite Certificate?

NGTC stands for National Gem Testing Center. It is one of the major gemstone and jade testing institutions in China, and its certificates are commonly used for jadeite jewelry sold in the Chinese market.

For jadeite buyers, the most important part of an NGTC certificate is the testing conclusion. When a certificate identifies the piece as jadeite and confirms it as natural Grade-A jadeite, it helps buyers understand that the item is natural and untreated, without bleaching, polymer filling or dyeing.

This is why certification matters when buying jadeite online. Photos can show colour, shape and texture, but a certificate gives an additional layer of material verification.

What Information Is Usually Shown on an NGTC Certificate?

An NGTC certificate usually includes several important fields. These details help connect the certificate to the exact jewelry piece.

Common information may include:

Testing conclusion
Total mass or weight
Shape
Colour
Precious metal information, if the piece is set in gold
Remarks
Magnification result
Certificate number
QR code or online verification information
A photo of the tested item

The certificate should match the actual item being sold. 
Here's an example:

• Conclusion

The conclusion on this certificate identifies the item as “翡翠饰品”, which means jadeite ornament or jadeite jewelry. This tells buyers the tested piece belongs to the jadeite category.

• Total Mass

The total mass shown on this certificate is 1.040g. This refers to the weight of the tested item. When checking a certificate, buyers should compare this information with the product details to make sure the certificate matches the exact piece being sold.

• Shape

The shape is listed as “雕件”, which means carved piece. This helps describe the form of the item. For jadeite jewelry, the shape field may show descriptions such as bangle, pendant, ring, carving or other related forms.

• Color

The colour is listed as “浅紫”, which means light lavender. This is the overall colour description recorded on the certificate. Buyers should understand that the certificate colour description is usually general, and the actual appearance may still look slightly different under different lighting conditions.

• Precious Metal

The precious metal field is blank in this example. This means the tested item does not include a precious metal setting, such as 18K gold or platinum. If a jadeite piece is mounted, this field may show the metal type.

• Remarks

This is one of the most important parts of the certificate. The result states “翡翠（A货）”, meaning jadeite (Grade-A), which indicates natural untreated jadeite. For buyers, this part is very important because it helps confirm that the jadeite is natural Grade-A jadeite rather than treated jadeite.

• Magnification Result

“纤维交织结构” refers to a fibrous interwoven structure, which is a typical structural feature observed in natural jadeite under examination.

• Certificate Photo

The certificate also includes a photo of the tested item. Buyers should compare this photo with the actual product photos. Even if the certificate image is small or simple, the overall shape and form should still match the piece being sold.

• Certificate Number and Verification Information

An NGTC certificate normally includes a certificate number, and many certificates also include a QR code or barcode for verification. Buyers can also go to the website for verification.

What Does “Natural Grade-A Jadeite” Mean?

Natural Grade-A jadeite means the jadeite is natural and untreated. It may be cut, carved, polished or set into jewelry, but it has not been chemically bleached, filled with resin or dyed to change its appearance.

This is different from treated jadeite. Treated jadeite may look attractive in photos, but its internal structure, durability and long-term value can be very different from natural untreated jadeite.

Many buyers also see the term “Type A jadeite”. In practical jadeite jewelry descriptions, Type A jadeite and natural Grade-A jadeite are commonly used to describe natural untreated jadeite.

What an NGTC Certificate Can Confirm

An NGTC certificate can help confirm the material identity and treatment status of a jadeite piece.

For buyers, this is useful because it answers one of the most basic questions: is this natural jadeite, or has it been treated?

A certificate can also help buyers check whether the listed item matches the tested item. The photo, weight, shape and certificate details should be consistent with the actual jewelry piece.

For online shopping, this is very important. Buyers cannot inspect the jadeite in person, so certification, clear photos, videos and honest descriptions should be considered together.

What an NGTC Certificate Does Not Tell You

A certificate is important, but it does not tell the whole story.

An NGTC certificate does not decide the full market value of a jadeite piece. Price still depends on many factors, including colour, texture, translucency, size, thickness, carving, craftsmanship, overall beauty and market demand.

For example, two pieces can both be natural Grade-A jadeite, but their prices may be very different. A vivid green, highly translucent jadeite piece with fine texture and good thickness will usually be valued differently from a pale or more opaque piece.

The certificate confirms the foundation, but the visual quality and overall condition still need to be evaluated carefully.

Why I Use NGTC Certification for Jadeite Jewelry

For natural jadeite, trust is very important. Many buyers are not able to examine the jadeite in person, especially when buying internationally.

I use NGTC certification whenever possible for jadeite pieces where certification is important, especially bangles, pendants, rings and higher-value items.

My goal is to make the buying process more transparent. A certificate does not replace real photos, videos and detailed descriptions, but it gives buyers a more reliable starting point.

FAQ

Is NGTC certification important for jadeite?

Yes, especially for higher-value jadeite jewelry. An NGTC certificate helps confirm the material identity and treatment status of the piece.

Does an NGTC certificate prove the price of jadeite?

No. A certificate confirms material information and treatment status, but price depends on colour, texture, translucency, size, thickness, craftsmanship and overall beauty.

Is Grade-A jadeite the same as Type A jadeite?

In jadeite jewelry descriptions, both terms are commonly used to describe natural untreated jadeite. Type A is often the more technical term, while Grade-A is widely used in commercial product descriptions.

Can natural Grade-A jadeite have cotton or natural lines?

Yes. Natural jadeite can have cotton, colour roots, natural lines or small mineral inclusions. These are part of natural formation and should be evaluated together with the whole piece.

How can I verify an NGTC certificate?

You can scan the QR code or use the certificate number to check the verification information, or go to the website and type the certificate information for verification. Always compare the certificate photo, weight, shape and description with the actual jadeite piece.

Explore certified natural Grade-A jadeite pieces and compare different colours, textures and styles before choosing the one that suits you.