What Is Type A Jadeite? The Complete Guide to Natural Jade
Jadeite is one of the most prized gemstones in the world — yet very few buyers truly understand what they are purchasing. The term Type A jadeite is used throughout the jade industry to describe the highest grade of natural, untreated jade. But what does it actually mean? And why does it matter?
This guide explains everything you need to know about Type A jadeite: how jade is classified, why authentic jade is so rare, and what to look for when buying natural jade jewelry.
What Is Jadeite?
Jadeite is a sodium aluminium silicate mineral and one of the two minerals classified as true jade. The other is nephrite, a softer calcium magnesium silicate. Although both are called "jade" in the market, jadeite is significantly rarer and more valuable — especially in its finest form.
Jadeite forms deep within the Earth under extreme pressure, primarily in Myanmar (Burma), which remains the world's primary source. Its colour, translucency, and texture are determined by trace minerals present during formation. The finest jadeite — known as Imperial Jade — is a vivid, semi-transparent emerald green, coloured by trace amounts of chromium.
Jadeite vs Nephrite: What Is the Difference?
Both jadeite and nephrite are genuine jade, but they differ in several important ways:
| Property | Jadeite | Nephrite |
|---|---|---|
| Mineral type | Pyroxene | Amphibole |
| Hardness (Mohs) | 6.5 – 7 | 6.0 – 6.5 |
| Lustre | Vitreous (glassy) | Waxy / greasy |
| Translucency | Higher | Lower |
| Rarity | Rarer | More common |
| Value | Higher | Lower |
| Primary sources | Myanmar, Guatemala | Canada, New Zealand, China |
What Does "Type A", "Type B", and "Type C" Mean?
The Type A / B / C classification system is the most important grading framework for jadeite. It describes the level of treatment the stone has undergone after it was mined.
Type A Jadeite — Natural, Untreated
Type A jadeite is natural jade that has not been chemically treated in any way. The only acceptable process is light surface polishing with wax — a traditional technique that does not alter the stone's structure or colour. Type A jade retains its original mineral integrity, and its value increases over time.
Type B Jadeite — Bleached and Polymer-Impregnated
Type B jadeite has been acid-bleached to remove brown staining, then injected with a clear polymer resin to improve its appearance. While it looks cleaner initially, the polymer degrades over time — causing the jade to turn yellow or brittle within years.
Type C Jadeite — Dyed
Type C jadeite has been artificially dyed to create or enhance its colour. Dye fades with exposure to sunlight and chemicals. Type C jade has essentially no long-term value.
How Is Jadeite Colour Graded?
Jadeite occurs in a wide range of colours, each with its own market value and cultural significance:
- Imperial Green — The most valuable colour. Vivid, even emerald-green with high translucency.
- Lavender — A soft purple or violet tone, believed to promote emotional balance and spiritual connection.
- White / Icy — Near-colourless with high translucency, resembling ice when finest quality.
- Yellow / Russet — Warm golden tones caused by iron oxidation.
- Black (Omphacite) — Dense black jadeite, increasingly popular in modern fine jewellery.
Where Does the Finest Jadeite Come From?
The world's finest jadeite originates from the Hpakant region of Myanmar (Burma). Burmese jadeite — often called "Burmese jade" — has been the global standard for Imperial Green jade for centuries. It was historically reserved for Chinese royalty and remains the most sought-after origin for collectors and serious buyers today.
How to Care for Type A Jadeite Jewelry
- Clean gently — Use a soft cloth dampened with clean water. Avoid harsh chemicals or ultrasonic cleaners.
- Avoid impact — Jadeite is hard but can chip if struck against a hard surface. Store pieces separately.
- Avoid extreme temperatures — Sudden temperature changes can cause micro-fractures.
- Store carefully — Wrap in a soft cloth or padded jewellery box away from other pieces.
Frequently Asked Questions About Jadeite
Is jadeite the same as jade?
Jadeite is one of two minerals called jade — the other being nephrite. Both are genuine jade, but jadeite is rarer, harder, and more valuable.
What makes Type A jade more expensive?
Type A jadeite is natural and untreated. Its colour, translucency, and structure are entirely natural, making it rarer and more durable than treated alternatives. Its value can appreciate over time, unlike Type B or C jade.
Can I test jade at home?
Basic home tests can suggest authenticity but cannot confirm it. The only reliable verification is a laboratory gemological report.
What colour of jade is most valuable?
Imperial Green jadeite — vivid, even, semi-transparent emerald green — is the most valuable colour. Lavender and icy white are also highly prized.
Does jade increase in value?
High-quality Type A jadeite, particularly Imperial Green, has historically appreciated in value. Fine Burmese jadeite is treated as a store of value by collectors in East Asia.