How to tell if a jade bracelet is real

A real jade bracelet has to pass two questions. Is it jadeite or nephrite at all? And is it untreated? You can check the first fairly well at home, with a loupe, a light and a weighing in water. The second you can only screen for. A bangle worth real money needs a laboratory report stating that no impregnation and no dye were found.

Nearly everything below concerns the solid bangle. Bead bracelets have a short section near the end.

Why bangles get faked, and why price comes first

Cutting a bangle takes a large, crack-free piece of rough, and cutters lay bangles out to avoid flaws. That is why a good untreated bangle is expensive, and why treatment is aimed at bangles. Dealers who have visited the workshops describe low-grade bangle blanks being bleached in acid, dyed to order and filled with resin before the final shaping and polish, then sold mainly through low-priced online and livestream channels.

So the first check needs no tools. A bangle that is bright, translucent and well colored but cheap does not make sense as untreated material. Neither does one with fine color that is full of cracks. Dealers treat that mismatch as the first and most reliable warning. What untreated bangles sell for is in how much a jade bracelet costs. One trade estimate from a US jade wholesaler puts a bleached, resin-filled bangle at roughly 5% to 10% of the value of the equivalent untreated one.

How to check a real jade bracelet, in order

1. Loupe. With a 10x loupe, read the polish in reflected light on the outer surface and on the flat inner rim, where it is easiest to read. Untreated jadeite is smooth, with at most a faint orange-peel dimpling. A bleached bangle shows small pits and a cobweb of fine etched cracks.
2. Light, all the way round. Turn the bangle through a full circle under a flashlight. Natural jadeite varies: grain, translucency and color change along an untreated bangle. Look at how the color ends as well. Natural green fades out gradually from a denser core, while dyed color lies in cracks and between grains in a net-like pattern and stops abruptly.
3. Tap. Listen for a clear ring or a short dull note.
4. Weigh it in water to learn which material you are holding.
5. UV lamp. In a dark room, untreated jadeite usually shows nothing, and a resin-filled bangle typically glows bluish-white evenly around its whole circumference. A glow is a strong warning. No glow is not a clearance, because some fillers do not fluoresce.

How to hold the light, read the surface and interpret a UV reaction is in checking jade with a flashlight or UV light. The tap and the weighing suit a bangle better than any other piece, so they get more room here.

The tap test and its limits

Hang the bangle from a thread so that nothing damps it, then tap it lightly with a metal spoon, a smooth pebble or another piece of jade. Dealers agree that an untreated jadeite bangle gives a clear, ringing note and a bleached, resin-filled one a short, dull note, and that the finer the grain, the longer the ring.

The test is a comparison, not a measurement, and it misleads in two ways:

• Coarse grain sounds dull. A bangle maker with decades at the bench points out that coarse-grained untreated jadeite also sounds low and dull, so a dull note does not prove treatment.
• For nephrite, dealers contradict each other. One finds marble and quartzite duller than nephrite. In another’s demonstration a white marble bangle rang brighter than the nephrite beside it, and a third could not separate nephrite from its imitations by sound at all. For a white bangle sold as nephrite, treat the tap as no evidence either way.

Weighing a bangle in water

A bangle is large enough to measure specific gravity on a kitchen or pocket scale, provided the scale reads to 0.01 g.

1. Weigh the bangle dry.
2. Tie a thin thread around it and weigh it again hanging fully submerged in water, touching nothing.
3. Divide the dry weight by the difference between the two readings.

If your scale has nothing to hang the bangle from, you can read that difference directly, since the weight a submerged object loses is the weight of the water it displaces. Stand a container of water on the scale, zero it, and lower the bangle in by the thread until it is fully under water without touching the sides or bottom. The reading is the difference, the bottom line of the formula. Knock off any air bubbles clinging to the bangle first.

A worked example, which is arithmetic and not a measured bangle: 60.00 g dry and 42.04 g in water is a difference of 17.96 g, and 60.00 ÷ 17.96 = 3.34.

Result	Consistent with
About 3.34	Jadeite
About 2.95	Nephrite
2.65	Quartz and quartzite
About 2.5 to 2.8	The serpentines used as jade substitutes

A jadeite figure does not mean untreated. GIA tested a bangle of 277.14 carats (55.4 g, about 2 oz), roughly 76 mm (3.0 in) across and 9 to 10 mm (about 0.4 in) thick, that measured a specific gravity of 3.34 and a refractive index of 1.66. Those are textbook jadeite values, and the bangle had been acid-bleached and heavily impregnated with wax.

What a treated bangle looks like in the hand

Too even. A bangle that is evenly bright, evenly translucent and the same color all the way round is typical of resin-filled material, as is one that looks chalky white when light passes through it. A specialist US dealer gives two loupe warnings that match what Chinese dealers say: a web-like surface texture, and color that appears to float in the stone.

One trick is particular to bangles. Dealers report green, lavender or blue polishing compound rubbed into the surface of coarse-grained bangles at the final polish. The color sits in pits and scratches, fades with wear, and comes off on a tissue moistened with alcohol.

Nobody can certify a bangle by eye. The same US dealer says even experts cannot be certain by sight whether a piece is A or B jade, and a Chinese dealer who visits the treatment workshops says the best treated bangles cannot be told from natural ones without instruments. The letters are explained in type A, B and C jade.

Bangles that are not jade at all

• Glass. GIA examined two glass bangles, a white one resembling nephrite and a mottled one resembling jadeite. Both held gas bubbles, and in the mottled one strings of bubbles were visible without magnification and could have been taken for natural structure. Look for round bubbles with a loupe and a strong light.
• Marble and quartzite sold as white nephrite. These are common in tourist shops. Dealers describe the marble as soft, sometimes banded, with a fine sugary sparkle on the surface, the quartzite as more transparent and glassy, and nephrite as having a soft, greasy luster. Weighing in water separates quartzite (2.65) from nephrite (about 2.95).
• Treated stone that was never jadeite. Dealers report quartzite and marble bangles that have been bleached, resin-filled and dyed in the same way as jadeite.

Cracks and glued repairs

GIA lists clarity as a value factor for jadeite because any fracture can strongly affect value. Broken bangles are sometimes glued back together. According to the Gems & Gemology study of the Burmese jade trade, the glue often fluoresces blue under UV, and the join can show as a colorless band across the bangle, sometimes with gas bubbles under magnification.

Bead bracelets

The price, loupe, light and UV checks apply to jade beads as they do to a bangle. The tap test does not. Weighing in water works only on loose beads, with the elastic and any metal removed.

Certificates and buying

• Ask in writing whether the bangle is untreated. In the United States the FTC’s Jewelry Guides say sellers should disclose treatments that are not permanent, need special care or significantly affect value, which covers bleached, impregnated and dyed jade. A specialist US dealer notes that a straight answer is sometimes given.
• Do not trust the certificate in the box. Dealers document fake certificates with their own fake lookup websites, genuine certificates photocopied for a different piece, and certificates that say only “jadeite”. Check the report number on the laboratory’s own website, and read whether the report states the absence of impregnation and dye.
• Have it tested yourself. For a bangle of any real value, dealers at every level give the same advice: use an independent laboratory you choose, whatever paperwork came with the piece, and ask for the right to do so before the sale is final. The test costs a small fraction of the price of a significant piece.

A bangle also has to fit, so settle the size first with the jade bangle size chart.