Eleanor Hartley
Two Stones, One Beloved Name
Jade has been carved, worn and treasured for thousands of years, but the stone in a jeweller's window could be one of two quite different minerals. Jadeite and nephrite share a look, a long history of use and a name, yet they differ in chemistry, hardness and the way they behave in a ring, bangle or pendant. Knowing which is which helps you buy with confidence, judge value sensibly and care for your piece properly.
Mineral Make-up: Two Different Families
Despite the shared name, the two are not closely related. They belong to separate mineral families, which explains almost everything else about them.
- Jadeite is a pyroxene — a sodium aluminium silicate. It measures roughly 6.5 to 7 on the Mohs scale and has a specific gravity of about 3.33, so it feels dense and weighty in the hand.
- Nephrite is an amphibole, part of the actinolite–tremolite series. It sits at about 6 to 6.5 on the Mohs scale, with a specific gravity near 2.95, making it noticeably lighter than jadeite of the same size.
Hardness, though, is not the whole story. Nephrite grows as a mass of interlocking fibres, giving it a remarkable toughness — a resistance to breaking — that exceeds its hardness rating. Jadeite is harder and denser, but it is more brittle and will chip rather than flex. This is exactly why a jadeite bangle can crack against a doorframe while a nephrite carving survives a knock.
Colour and Lustre: What You Actually See
Jadeite offers the widest and most vivid palette. Fine imperial green is the most celebrated, but you will also find apple green, lavender, grey, white, yellow, orange-red and near-black. Good jadeite is often translucent, with a glassy to slightly oily lustre, and light seems to travel into the stone. The finest pieces look almost icy.
Nephrite is more restrained. Its classic colours are creamy white, spinach green, olive and brown, with darker black material also found. It is typically opaque to semi-translucent and has a waxy, almost soapy lustre. It will not usually give you the glassy glow of jadeite, but it has a soft depth that many collectors prefer.
A quick field test: hold a piece up to a lamp. Jadeite often shows a bright, even inner glow; nephrite tends to absorb light rather than pass it.
How Each Behaves in Everyday Jewellery
Both stones are cut into cabochons, beads, bangles and carved pendants, but their strengths differ. Jadeite is chosen when colour and translucency matter most — think of a bangle, a string of graduated beads or a small ring stone where clarity is the point. Treat it gently. Thin jadeite sections, particularly bangle edges, are vulnerable to chipping, and an untreated stone can develop a dull surface over decades of wear.
Nephrite is the practical workhorse. Its fibrous toughness makes it ideal for carved pendants, signet-style rings, cufflinks, inlay and pieces meant to be worn daily. It resists breakage well, though it will still scratch. Both stones are softer than quartz, so they will not shrug off grit the way a diamond or sapphire will.
Weight and warmth are useful clues. Jadeite feels cool and heavy, nephrite lighter and slightly softer to the touch. Neither is magnetic, and neither should feel greasy or plastic-like.
Treatments, Testing and Buying
Much of the jadeite on the market has been treated. Bleaching followed by polymer impregnation — often called "B jade" — improves clarity, while dyeing, or "C jade", enhances colour. Some pieces are both. Nephrite is sometimes waxed to improve its surface. These treatments are not always dishonest, but they must be disclosed and they lower value considerably.
Only a gem laboratory can confirm identity and treatment with certainty, using a refractometer, specific gravity testing and magnification. From a practical buying standpoint, ask the seller directly whether the stone is natural, treated or synthetic, and ask for the answer in writing on the receipt. A dealer who is confident will not mind.
Caring for Jade Day to Day
- Clean with lukewarm water, a drop of mild soap and a soft brush, then dry with a soft cloth.
- Avoid ultrasonic and steam cleaners, particularly on treated stones, as these can damage the surface or loosen filling.
- Store pieces separately in a soft pouch or lined compartment so they do not knock against harder gems.
- Remove bangles and rings for gardening, gym sessions, washing up and heavy lifting.
- Keep away from perfume, hairspray, household cleaners and prolonged sunlight, which can fade dyed colour.
- Check strung bead necklaces periodically and restring on silk before the thread wears thin.
Bought with a little knowledge and worn with a little care, either stone will reward you for a lifetime. Jadeite gives you colour and glow; nephrite gives you toughness and quiet depth. Both are genuinely worth owning — just know which one you are welcoming into your jewellery box.
