Jadeite Treatments Explained: Type A, Type B & Type C Jade – What You Should Know Before Buying

Originally published: April 4, 2020
Last updated: January 30, 2026

Jadeite Treatments Explained: Type A, Type B & Type C Jade

Because the right combination of color, transparency, and texture can raise the value of jadeite to spectacular levels, many producers use treatments to enhance jadeite’s appearance. Some of these treatments have been practiced for centuries and are widely accepted as part of traditional jade finishing methods. Others, however, are relatively modern and have raised serious concerns within the gem trade.

In the international gem trade, jadeite is generally classified into three main categories based on treatment methods: Type A, Type B, and Type C jadeite.

Type A Jadeite — Natural Untreated Jade

Type A jadeite is natural jadeite that has undergone only traditional finishing processes. After cutting and polishing, manufacturers briefly dip the jadeite into melted wax to enhance its surface luster and fill microscopic pits and surface fractures. Before waxing, the jadeite is typically boiled in water to allow better wax absorption and reduce the risk of cracking.

This wax treatment fills the spaces between microscopic crystal grains, producing a smooth, luminous finish. This traditional process is extremely common, stable, and does not affect jadeite’s value. In the gem trade, Type A jadeite is considered fully natural and commands the highest prices.

Type B Jadeite — Acid-Treated & Polymer-Impregnated Jade

Type B jadeite undergoes a much more invasive treatment process. Manufacturers soak the jadeite in hot hydrochloric or sulphuric acid for extended periods to bleach out undesirable brown or yellow oxidation stains. During this process, sodium is leached from the jadeite, altering its chemical composition and significantly compromising its durability.

After acid bleaching, the jadeite becomes dull, chalky, and porous, containing countless microscopic voids. To restore transparency, color, and luster, manufacturers impregnate the stone under pressure with paraffin wax or clear polymer resin. While this improves visual appeal, it also reduces structural integrity, making the jadeite more brittle.

Type B jadeite has existed in the market since at least the mid-1970s and is sometimes found in older jewelry. Unfortunately, some Type B jadeite is sold without proper disclosure, which has caused significant controversy in the jade market. When buyers understand they are purchasing treated jadeite, they can make informed decisions and negotiate fair pricing.

Type C Jadeite — Dyed Jade

Type C jadeite refers to natural jadeite that has been dyed to enhance or alter its color. In many cases, this material is also bleached and impregnated with wax or polymer resins. Dye treatments may fade over time or under heat and light exposure, making Type C jadeite far less valuable than untreated material.

• Type A jadeite: Natural jadeite enhanced only with a traditional wax surface coating.
• Type B jadeite: Acid-bleached jadeite impregnated with wax or polymers.
• Type C jadeite: Dyed jadeite, often combined with bleaching and polymer impregnation.

Jadeite treatments are common, and distinguishing treated jadeite from untreated material can be challenging without laboratory testing.

Heat Treatment in Jadeite

Jadeite containing iron inclusions can be heat-treated to produce vibrant orange and red hues. Unlike acid and polymer treatments, heat treatment in jadeite is considered stable and typically undetectable, and it does not significantly affect durability.

Choosing Natural Jadeite Jewelry

Understanding jadeite treatments allows buyers to make informed decisions and avoid heavily treated stones. For those who value natural beauty, durability, and long-term worth, untreated Type A jadeite remains the gold standard.

You may explore our curated selection of natural jadeite bangles and jewelry, chosen according to strict gemological standards.

Frequently Asked Questions About Jadeite Treatments

Is treated jadeite safe to wear?

Yes, treated jadeite is generally safe to wear. However, heavily treated jadeite—especially Type B and Type C—may have reduced durability and long-term stability. Buyers seeking longevity and heirloom quality typically prefer natural Type A jadeite.

How can I tell if jadeite is natural or treated?

Visual inspection alone is often insufficient. Professional gemological testing is required to accurately identify jadeite treatments. Certificates from recognized gemological laboratories provide the most reliable verification.

Does treated jadeite lose value?

Yes. Type B and Type C jadeite typically have significantly lower market value than natural Type A jadeite due to durability concerns and long-term instability. Natural untreated jadeite consistently commands the highest prices.

— Extracted and adapted from GIA, Colored Stone Jade, with expert interpretation.