Demystifying Type A, B, and C Jadeite: What Are You Really Buying?
A split image showing three similar-looking jadeite bangles with clear labels: Type A (Natural), Type B (Treated), Type C (Dyed).
As you delve deeper into the world of jadeite, you'll inevitably encounter the terms "Type A," "Type B," and "Type C." These classifications are not about quality, but about treatment—what has been done to the stone after it was mined. Understanding this is absolutely crucial for any serious buyer or collector.
Type A Jadeite: The Purity of Nature
What it is: This is jadeite in its pure, natural state. It has been shaped and polished, often with a layer of wax, but has not been chemically treated or dyed.
Why it matters: Type A jadeite is the most valuable and desirable. Its color and structure are completely natural, and it is considered stable for a lifetime. When you invest in a high-end piece, it should be Type A.
Type B Jadeite: Beauty Through Treatment
What it is: This jadeite has been chemically bleached to remove impurities and brownish tones, and then impregnated with a polymer resin to add stability and transparency.
Why it matters: This process can significantly improve the appearance of lower-quality, porous jadeite. However, the treatment is not permanent. The resin can degrade over time with exposure to heat and chemicals, causing the stone to become dull or discolored. Type B jade is less valuable and requires more careful care.
Type C Jadeite: Color by Design
What it is: This jadeite has been artificially dyed to enhance or add color. It is often both bleached and dyed (making it "B+C" Jadeite).
Why it matters: The colors can be unstable and may fade over time. In many markets, selling dyed jadeite without disclosure is considered fraudulent. These pieces have the lowest value.
How to Protect Yourself as a Buyer
Always Ask for Disclosure: A reputable seller will always specify if the jadeite is Type A, B, or C.
Request a Certificate: For any significant purchase, insist on a certificate from a reputable gemological lab (like GIA, Gubelin, or AIG). The certificate will definitively state the jadeite's treatment.
Be Wary of "Too Perfect" Deals: If the price for a vibrant, translucent piece seems too good to be true, it probably is.
Knowledge is power. Understanding these treatments ensures you make an informed purchase and invest in a piece that will truly last.