Jade

Identity and appearance

Jade is an umbrella gem name that includes jadeite and nephrite, rather than a single mineral with one fixed set of properties. Certain green omphacite materials are also included in gemological usage.

Colour alone cannot separate these materials or establish whether jade has been dyed, impregnated or otherwise treated. Ask for the actual material and treatment conclusion.

Care and handling

Avoid applying one hardness or cleaning rule to all jade objects. Surface treatments and assembled pieces need individual assessment.

Questions for an individual stone

Keep the material name, natural or laboratory-grown origin, treatment description and any report together. Ask which conclusions were established by examination and which remain unknown. The reference properties here describe a material; they are not measurements of a stone offered for sale.

If a description and report disagree, request clarification before making a decision. Photographs are useful for discussing appearance, but cannot authenticate a specimen. Keep care instructions with the item so that a jeweller or repairer can assess it before work begins.

Comparison and interpretation

Begin with the actual material rather than a single green colour category. Jadeite and nephrite differ mineralogically, and the broad gem term jade should not be used to assign one fixed density, refractive index or hardness to every object. An opaque carving may require a different examination approach from a small translucent cabochon. Ask which material was established and what was assessed for treatment. A familiar commercial grade or colour name is not a replacement for the underlying identification and disclosure.

Choosing and documenting a piece

For a carved object, inspect the entire piece rather than only a bright patch in a close-up. Surface polish, fractures, thin edges and any assembled components affect handling. Ask about dye, polymer impregnation and other treatments in precise terms, and retain the answers in writing. Cleaning advice must reflect those details. A matrix or colour pattern should not be used as proof of a source location. If a report describes only part of an assembled object, clarify which components were examined before treating the conclusion as applying to the whole piece.

Before making a decision

For jade, ask the seller to identify the actual item, state what remains unknown and explain the scope of any report. Keep photographs, measurements and written disclosures together. If an answer matters to your decision, obtain it before commissioning a setting or arranging a repair.

Sources and further reading

• GIA Jade reference Checked 2026-10-16

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