Nephrite jade: what it is, what it means and where it comes from

Nephrite jade is one of the two stones called jade: a rock made of tremolite and actinolite fibers matted together, sold in China as Hetian jade. Next to jadeite it is slightly softer yet harder to break, and fine nephrite has a soft, oily glow where jadeite tends to look glassy, which is why good nephrite jade jewelry is judged by that glow before its color.

Almost everything a buyer notices about nephrite comes back to two facts: how its fibers are matted together, and how much iron the stone holds.

What is nephrite jade made of?

Nephrite jade is made of microscopic fibers of tremolite and actinolite, two closely related minerals of the amphibole group, matted together so tightly that the stone counts as a rock rather than a single mineral. Tremolite and actinolite are neighboring members of one mineral series: where magnesium fills one particular position in the crystal the mineral is tremolite, and as iron takes its place it grades into actinolite. That iron is what moves nephrite from white toward green, as the color section below explains.

The matted fibers give nephrite its three defining traits:

• It is tough. Under a microscope the fibers lie in bundles woven across one another, so a crack that starts in the stone has to work its way around them instead of running straight through.
• It glows rather than shines. The same felted texture scatters light softly, so fine polished nephrite usually looks oily to waxy rather than glassy, though the polish and the surface play a part too.
• It is slightly light in the hand. Its specific gravity is about 2.95, against about 3.34 for jadeite, so a nephrite piece weighs a little less than a jadeite piece of the same size.

Is nephrite a gemstone?

Nephrite is a gemstone, one of the two main materials gemologists accept as jade. Its appeal lies in color and glow rather than sparkle, so it is almost never faceted: cutters polish it into cabochons, beads and bangles, or carve it.

How hard is nephrite jade?

Nephrite jade is 6 to 6.5 on the Mohs scale, a little softer than jadeite at 6.5 to 7, but it is the tougher of the two. Hardness and toughness measure different things: hardness is how well a stone resists scratching, toughness how well it resists breaking. In a 1973 study of jade toughness, nephrite took nearly twice as much energy as jadeite to open a new fracture surface. That toughness is why Neolithic people made axes and adzes from it.

For daily wear, the two numbers point in different directions. Nephrite is hard enough to scratch window glass, but quartz grit, sapphire and diamond can all scratch it, so fine scratches on the polish are the wear you are most likely to see. Toughness does not make it unbreakable, either: a nephrite bangle dropped on tile can still crack.

What colors does nephrite jade come in?

Nephrite jade comes in white, gray-green, green, black, yellow and brown, in softer tones than jadeite. Iron sets most of that range: nephrite with almost no iron is white, more iron turns it gray-green to green, and chromium deepens the green. Black comes either from graphite or from a great deal of iron.

What is white nephrite jade?

White nephrite jade is nephrite with little iron, and white is the nephrite color most prized in China today; in Chinese tradition it stands for purity, a meaning traced further in what white jade means. White nephrite is carved into pendants and also cut into beads, as in a white jade bracelet. It runs from a cool, slightly gray white to a warm cream, and when a faint gray-green cast shows, the Chinese trade calls it qingbai, "blue-white" jade.

What is mutton fat jade?

Mutton fat jade is the name for the finest white nephrite: a soft white with a strong oily luster, as though the stone were made of solid fat. It names a grade of white nephrite, not a separate mineral.

"Is this white jade mutton fat?" is the question we hear most about white nephrite. When I buy, my own standard for the name is a warm, glutinous white that is white without looking stiff, a strong oily luster, and a fine structure with no obvious cotton-like flecks when I put a flashlight to it. A dry, dead, bright white is not mutton fat, however white it is.

In the market the name is used loosely, and ordinary white nephrite is often sold under it. China's national standard for grading Hetian jade, GB/T 44914-2024, in force since June 1, 2025, gives it a formal meaning: mutton fat white jade is white nephrite graded A, the top grade, for color, texture, clarity and uniformity alike. Its grade A texture and clarity read much like the standard I described above: fine, dense and oily to the eye, with grain hard to see when light shines through, and only a few tiny flecks. Mine is still a buying standard, not a grade. Only a grading report under the national standard can call a piece mutton fat in that formal sense. The NGTC identification certificates that come with our pieces are a different document: they name the material, natural Hetian jade, and do not grade it, so they never say mutton fat.

What is green nephrite jade?

Green nephrite jade, in the trade, usually means biyu (碧玉), spinach-green nephrite; darker or grayer greens such as qingyu and taqing go by their own names. What green jade stands for, in China and in crystal practice, is covered in the meaning of green jade. Biyu gets its color from iron and chromium, and it almost always carries small black dots; what they are, and what they mean for a buyer, is explained under choosing nephrite below.

What is black nephrite jade?

Black nephrite jade gets its color in one of two ways. Hetian black jade, moyu ("ink jade"), is colored by graphite, as China's national standard for Hetian jade, GB/T 38821-2020, records. Other black nephrite is rich in iron: black nephrite from Guangxi, in southern China, looks black at normal thickness because of its high iron content, and thin slices of the same stone turn green to yellow-brown against the light.

Black nephrite is a different material from mo cui, the trade name for a black jade that GIA identifies as omphacite jade, a close relative of jadeite; our guide to black jade compares the two and explains what black jade means. Both are real jade.

Does nephrite jade come in yellow and brown?

Nephrite jade does come in yellow and brown. Yellow nephrite runs from pale to deep yellow, and fine yellow was once ranked above white: the Ming writer Gao Lian put sweet yellow jade first and mutton fat second in his Zunsheng Bajian, published in 1591. Brown nephrite is known in China as sugar jade, tangyu, for its red-brown to yellow-brown color, which usually sits in the outer part of a piece next to white. Studies link the brown to iron and manganese, though its exact cause is still debated.

Is there blue nephrite jade?

Nephrite jade can be bluish green, but true blue is not one of its usual colors, so read a "blue nephrite" label with care. Some stones sold under that name are not nephrite at all: in 2000, GIA examined a blue rock marketed as Siberian blue nephrite and found it was mostly a different amphibole mixed with quartz. For any stone sold as blue nephrite, the identification on its lab report is the answer.

Where is nephrite jade found?

Nephrite jade is found in many countries, and the largest commercial sources are Xinjiang and Qinghai in western China, British Columbia in Canada, and Siberia in Russia. Canadian nephrite, almost all of it from northern British Columbia, is dark spinach green, often with black dots. Siberian nephrite includes the brightest greens of the main sources, from the Eastern Sayan Mountains, as well as white material. New Zealand's nephrite is pounamu, and Wyoming and Alaska made nephrite their state gemstone in 1967 and 1968.

The kind of rock nephrite grew in, which where jade is found sets out deposit by deposit, usually decides where it falls in the color range. White nephrite mostly forms where hot fluids alter dolomitic marble, a rock low in iron, while green forms along serpentinite, which carries more. Color also depends on the iron, chromium and dark inclusions a particular stone holds, so the pattern has exceptions: at Cowell in South Australia, nephrite grew in dolomitic marble yet runs from yellowish green to black. Color alone can't tell you which kind of deposit a stone came from.

Is Hetian jade the same as nephrite?

Hetian jade is nephrite. The name comes from Hotan (Hetian in Chinese), an oasis town in southwestern Xinjiang and the historic home of Chinese nephrite, but China's national standard uses it as a material name for nephrite from any source; our guide to the types of Chinese jade covers its eight colors, its forms and its grades. Most Hetian jade on the market is mountain material, quarried from deposits in places such as Qiemo and Yutian counties. River pebbles, called seed material (zi liao), come from riverbeds such as the Yurungkash; they are scarce, priced far above mountain material, and traded mostly among high-end collectors.

Is nephrite real jade?

Nephrite is real jade, and in China it is the original jade. Its Chinese name, ruanyu, "soft jade," records a half step of hardness rather than a lower grade, a point our guide to the two kinds of jade covers in full. Jade working in China goes back about 9,000 years, almost all of it in nephrite, while jadeite only began reaching China in quantity from Burma in the 18th century.

Why is nephrite usually cheaper than jadeite?

Nephrite is usually cheaper than jadeite because it is far more plentiful, and "Why is nephrite cheaper?" is one of the questions customers ask us most. Nephrite is mined commercially on several continents, while gem-quality jadeite comes from a handful of districts, mostly in northern Myanmar, and its finest translucent greens sit at the top of the jade market.

The price gap holds on average, not piece by piece, as the figures in our jade price guide show. Fine white Hetian nephrite, and river pebble material above all, can cost more than ordinary jadeite, because the two are priced on different scales.

What does nephrite jade mean?

Nephrite jade means different things in different traditions: in China it stands for virtue and moral character, in New Zealand it is pounamu, a treasured stone, and in crystal practice it is described as a stone of protection and emotional balance.

What does the word nephrite mean?

The word nephrite means "kidney stone." It came into English in 1794 from German Nephrit, built on the Greek nephros, "kidney," because the stone was once valued as a remedy for kidney ailments; its older Latin name was lapis nephriticus. Nephrite is pronounced NEF-rite, with the stress on the first syllable.

What does nephrite mean in Chinese culture?

In Chinese culture, nephrite carries the classic meanings of jade, because those ideas grew up around it. The Shuowen Jiezi, a dictionary compiled around 100 AD, names five virtues in jade and ties each one to something you can see or feel in the stone: a warm, moist luster stands for benevolence, and the way jade will break rather than bend stands for courage. Both describe nephrite closely, since its glow is soft and warm and it is famously hard to break.

Jade's meanings in Chinese, Māori and Mayan tradition are gathered in what jade means across cultures. In everyday custom, a carved pendant on a jade pendant necklace carries wishes for peace and a long life, whether its owner bought it or received it as a gift.

What is pounamu?

Pounamu is the Māori name for the hard green stones of New Zealand's South Island, and most pounamu is nephrite. The word also covers translucent bowenite, a kind of serpentine, so not all pounamu is jade. It is found mostly as boulders and pebbles in the rivers and on the beaches of the West Coast, Fiordland, western Southland and Nelson.

To Māori, pounamu is a taonga, a cultural treasure. Under the Ngāi Tahu (Pounamu Vesting) Act 1997, natural pounamu in the tribal area of Ngāi Tahu, the principal Māori tribe of the South Island, passed from the Crown to the tribe. New Zealanders often call the stone greenstone, although that word is also used for unrelated green stones around the world.

What is the spiritual meaning of nephrite jade?

In crystal practice, the spiritual meaning of nephrite jade is protection, good fortune and emotional balance, and green nephrite is usually linked with the heart chakra. Crystal sellers also describe nephrite as a stone of fidelity and credit it with healing properties; what crystal practice claims for jade, and what the evidence says, is covered in the benefits people claim for jade. These are beliefs held within crystal practice, not effects shown by research, and no stone takes the place of medical care.

What should you look for in nephrite jade?

Good nephrite jade is fine and dense with a soft, oily glow, and when we buy, we judge that glow before color. As the Chinese trade puts it, jadeite is judged by its texture and color, nephrite by its wenrun (温润), the warm, moist look of fine material. A stone with poor material underneath is worth little however vivid its color.

Whether I am choosing white or green nephrite, I check five things in this order:

1. Fineness. I look at the structure in weak side light: the less grain shows, the finer the stone, and the best material shows almost no structure even with a flashlight behind it. Material that feels chalky and stony and looks dry stays that way. In my experience its surface looks grayer and duller after six months to a year of wear, once the polishing wax has worn off and the dry stone shows through, which is why we never pay much for it, however bright its color.
2. Oily luster. In the hand, fine nephrite feels smooth and dense, and its glow seems to come from inside the stone. A bright glare that sits only on the surface comes from the polish, not from the material.
3. Color. White should be a true white, neither gray nor stiff. Green should be pure and even rather than deep: a fully even spinach green is worth far more than a mottled one, and soft pale greens such as fenqing (粉青) and duck-egg green (鸭蛋青) can sell for more than ordinary spinach green when the stone is fine and even. Grayish and muddy, yellowish greens are low grade.
4. Impurities. In white nephrite I put a flashlight to the stone to look for cotton, the trade's word for cloudy white flecks. In green nephrite I look at the black dots, which need a section of their own.
5. Cracks. An open crack is not traded off against the other four, so for a buyer the order runs the other way: rule out a cracked piece first, then compare the rest.

What do the black dots in green nephrite mean?

Black dots in green nephrite are usually natural mineral grains: most are chromite, a chromium mineral, though magnetite and other dark minerals turn up too. Chromium is also one of the elements that make the stone green. The trade saying wu hei bu cheng bi (无黑不成碧), "no black, no biyu," treats them as part of the stone. They still differ a great deal in value. When I buy, I sort them by eye into three kinds, using the trade's words "live" and "dead"; that sorting sets a price, but it can't prove what a dot is made of.

Most Xinjiang biyu has its natural dots scattered as single points, and many collectors read that pattern as a sign of Xinjiang material, though no pattern of dots proves where a stone came from. For the same quality of material, fewer dots means a higher price. Dot-free biyu is rare in large pieces, so most of it is cut into small cabochons for jade rings, and a dot-free bangle in full, even green belongs in the top price tier. Dots on the edge or back of a piece, where carving or a setting hides them, often make for good value, and experienced buyers look for exactly those pieces. China's grading standard also looks at where dots sit: it grades them under clarity by their size, number, position and nature.

Does nephrite get oilier the longer you wear it?

Many people who wear nephrite every day find that its surface takes on a softer sheen over the years, and Chinese collectors have a name for handling jade to bring that sheen up: pan yu. What wear cannot change is the stone itself. The oily look of fine nephrite comes from its dense, fine structure, so dry, coarse material stays dry however long it is worn. Part of a new piece's shine also comes from the thin polishing wax we finish every piece with, a standard final step for jade that wears away with regular wear.

Quick answers about nephrite jade

What is nephrite used for?

Nephrite is used today mainly for jewelry and carving: beads and bangles, cabochons for rings and jade hoop earrings, carved pendants, and ornaments of every size. Nephrite is shaped with abrasives, since metal tools barely cut it, and our comparison of hand carved vs machine carved jade explains what each method leaves behind. Earlier uses went beyond jewelry: China's Neolithic Liangzhu culture, about 3300 to 2300 BC, carved ritual bi discs and cong tubes, many of them in nephrite, and Māori made pounamu into toki (adzes), mere (short clubs) and hei tiki, carved pendants in human form.

How old is nephrite?

Nephrite's age depends on the deposit, and some of it formed long ago: the nephrite at Cowell in South Australia formed about 1.7 to 1.6 billion years ago. People have worked nephrite for a tiny fraction of that time.

Is nephrite rare?

Nephrite as a material is far less rare than jadeite: it is mined on several continents and has been found in many countries. How rare a particular piece is depends on its quality, color, size and form. Evenly white, oily Hetian material without cracks is hard to find, and Xinjiang river pebbles of that quality are scarcer still.

How do you care for nephrite jade?

Nephrite jade needs little care: wipe it with a soft cloth, wash it in room-temperature water with a drop of mild dish soap when it gets oily, and store it apart from harder gems, as our bangle care guide explains in more detail. We never put jade in an ultrasonic cleaner, because the vibration can turn a hidden fracture into a crack, and we skip toothpaste, which wears down the polish.

Is nephrite treated or dyed?

Nephrite can be dyed or filled, so a lab report is the way to confirm that a piece is natural, and what a jade lab report can and cannot prove is explained in its own guide. GIA has reported white nephrite polished into pebble shapes and partly dyed to pass as river pebbles with brown or orange skin, and nephrite bangles whose pits were filled with dark material to imitate natural skin; dyed black dots, described above, are another trick.

How can you tell if nephrite is real?

Real nephrite is confirmed by a lab report; at home you can only narrow down the suspects. Glass, dyed quartzite and serpentine are the imitations most often sold as jade, and a gemologist separates them from nephrite by specific gravity, refractive index and structure. Which home checks are worth doing, and which are myths, is covered in the home tests people use on jade.

Every piece of nephrite we sell is Xinjiang material, bought through suppliers, natural and not dyed; each piece ships with an NGTC identification certificate naming it as natural Hetian jade, and you have 30 days to return it. I choose it in the order described above, fineness first, and if a piece catches your eye we will send photos of it in daylight, in side light and under a flashlight, along with its thickness, before you buy. More about how BMjade works is on our About us page.

Sources

• Hsu, Tao, Kirk Makepeace, Andrew Lucas and Nikki Makepeace. "The Nephrite Jade Road: Evolution of the Green Nephrite Market." GIA, 2015.
• Gao, Kong, Ting Fang, Taijin Lu, Yan Lan, Yong Zhang, Yuanyuan Wang and Yayun Chang. "Hydrogen and Oxygen Stable Isotope Ratios of Dolomite-Related Nephrite: Relevance for Its Geographic Origin and Geological Significance." Gems & Gemology, Summer 2020.
• Zhong, Qian, Zongting Liao, Lijian Qi and Zhengyu Zhou. "Black Nephrite Jade from Guangxi, Southern China." Gems & Gemology, Summer 2019.
• Bradt, R. C., R. E. Newnham and J. V. Biggers. "The Toughness of Jade." American Mineralogist 58 (1973): 727-732.
• State Administration for Market Regulation and Standardization Administration of China. "GB/T 44914-2024, Hetianyu Grading." National standard of China, in Chinese, 2024. Accessed October 2026.
• Merriam-Webster. "Nephrite." Merriam-Webster.com Dictionary. Accessed October 2026.