JADE AT A GLANCE

Jade is a valued ornamental gemstone, but the name does not refer to just one mineral. In gemology, it mainly describes jadeite and nephrite. Some green omphacite may also be included in broader gemological definitions. Their fine, interlocking crystals give both jadeite and nephrite exceptional toughness, even though they can still be scratched.

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JADEITE AND NEPHRITE

Jadeite can appear in many colors, including green, lavender, white, yellow, orange, brown, gray, and black. Fine, vivid green jadeite is especially prized, but color preferences vary. Nephrite is commonly found in green, white, gray, brown, and black shades, often with a softer, more subdued appearance. Color alone cannot tell you which material you have.

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HOW JADE QUALITY IS JUDGED

Color: Consider hue, tone, saturation, evenness, and whether the color suits the piece.

Translucency: Jade ranges from opaque to translucent. A pleasing glow can add appeal, but opacity does not make a piece unreal.

Texture: Fine, even texture can create a smooth, attractive surface. Natural inclusions and color patterns are part of each stone’s character.

Craftsmanship: For carvings and jewelry, look at proportion, polish, symmetry, finishing, and the skill of the design.

Size and overall appearance: Larger pieces may cost more when other qualities are comparable, but jade is often evaluated as a whole piece rather than by weight alone.

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NATURAL JADE AND TREATMENTS

“Natural” describes geological origin; it does not always mean that a finished stone is completely untreated. In common trade terminology, Type A jadeite is natural jadeite that may be polished with wax; Type B is acid-bleached and impregnated with polymer; and Type C is dyed. Combinations can occur. These labels are mainly used for jadeite and should be explained clearly by the seller. Nephrite can also be treated.

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Color, shine, or a home test cannot reliably prove a stone’s identity or treatment. For a significant purchase, ask for a written description and an independent gemological report that identifies the material and discloses detectable treatments. A laboratory report is more reliable than a visual guess.

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CARING FOR JADE

Clean jade gently with warm water, mild soap, and a soft cloth, then dry it carefully. Avoid heat, harsh chemicals, and sudden temperature changes. If you do not know whether a piece has been treated, avoid ultrasonic and steam cleaners. Store jade so it does not rub against harder gemstones or metal.

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​A thoughtful jade purchase starts with clear disclosure: ask whether the piece is jadeite or nephrite, what treatments are present, and what documentation is available. This guide is educational; a qualified gemological laboratory can examine a specific stone.