Identify Type A, B or C jadeite. A Few Screening Tools for Jadeite at home

**UV/fluorescence testing can be a useful first screening tool, but only as a quick, low-cost filter, not a confirmation of real untreated jadeite

Natural Jadeite ring pendant

How it works as a first test

• Use a 365 nm long-wave UV flashlight (the better quality ones sold for currency checking or jade testing; avoid cheap 395 nm lights that perform poorly).

• Test in a completely dark room.

• Strong chalky blue-white glow (especially overall or in cracks) is a red flag → often indicates polymer resin (Type B treatment). Dyes can also cause uneven or colored fluorescence.

• No glow or only very faint/weak response is the expected result for most natural untreated Type A jadeite.

  
  

This is fast, cheap, and non-destructive, so it makes sense as an initial screen before investing more time or money.

Important limitations (why it is only screening)

• Not all treated jade fluoresces — newer resins can be weak or inert under consumer UV lights.

• Some natural Type A jadeite shows weak natural fluorescence from inclusions or minerals.

• Surface wax (normal and acceptable on Type A) can produce some glow.

• Many common imitations (quartz, glass, plastic, serpentine, etc.) often show no fluorescence, so a dark result does not prove the piece is jadeite or untreated.

• A glowing piece is suspicious; a non-glowing piece proves almost nothing.

  
  

Recommended practical order for home screening

1. UV test (quick red-flag check for resin/dye).

2. Feel, weight, temperature (jadeite is dense and stays cool longer than glass or plastic).

3. Transmitted light (flashlight) test with a 10x loupe - look for natural fibrous or granular structure, even color distribution, and no bubbles or dye concentration in cracks.

4. Sound test (for solid bangles) if applicable - genuine jadeite rings with a clear, sustaained tone; heavy treated pieces sound dull.

5. If it still looks promising and the value is high, send it to a reputable lab, like GIA (FTIR for polymer is the key test).

   
   

Bottom line: Yes, use the UV (fluorescence) test as a convenient first screen. A strong glow means “be suspicious, investigate further.” No glow means “continue with other checks.” It cannot by itself prove a piece is natural, untreated jadeite.