A carver in Aotearoa New Zealand once told a collector that if you cannot tell the difference, you do not own the stone. Pounamu and greenstone are not synonyms. Pounamu is the Māori name for a specific nephrite jade found only in New Zealand’s South Island, while greenstone is a broad trade term for any green-hued stone used in carving worldwide. The distinction is legal, geological, and cultural. It matters when you buy, when you wear, and when you speak of the stone.
Pounamu is Māori nephrite jade from New Zealand’s South Island; greenstone is a broader trade term for any green carving stone. The difference is legal, geological, and cultural. This guide explains how to tell them apart and why authenticity matters.
The Short Answer: Two Names, One Stone (Sometimes)
Pounamu (pronounced POH-nah-moo) is the Māori word for the nephrite jade, bowenite, and serpentine found in Te Wai Pounamu, the South Island of New Zealand. Under the 1997 Protected Objects Act, the term carries legal weight: only stone from New Zealand’s South Island rivers and coastal deposits qualifies.
Greenstone is an English catch-all. It covers pounamu, but also jadeite from Myanmar, nephrite from British Columbia, serpentine from Cornwall, and any green-hued rock a seller decides to call greenstone. When a dealer in Auckland says “greenstone,” they almost certainly mean pounamu. When a dealer in a tourist shop in Queenstown says it, they might not.
The confusion is old. European settlers heard the Māori word, approximated it as “greenstone,” and applied the name to any green mineral they found. The Victorians compounded the problem by importing jadeite from China and calling it “greenstone” too. The term became meaningless as a geological label.
Where Pounamu Comes From: The Map Matters
Pounamu comes from one place: the West Coast of New Zealand’s South Island, from a region Māori call Te Tai Poutini. The stone erodes out of the Alpine Fault, the same tectonic boundary that created the Southern Alps. It washes down rivers like the Arahura, the Taramakau, and the Kawatiri (Buller River), where it deposits in riverbeds and along the coast.
The Ngāi Tahu iwi (tribe) hold guardianship over pounamu under the 1997 Ngāi Tahu Claims Settlement Act. Commercial extraction requires their permission. The Arahura River remains a legally protected source, and the stone cannot be legally mined from its banks. What enters the market is collected by hand from riverbeds, often by families who have worked the same stretches for generations.
Greenstone, by contrast, can come from anywhere. British Columbia nephrite, Australian chrysoprase, Chinese jadeite, Pakistani serpentine. None of it is pounamu, but all of it can be sold as greenstone.
How to Tell Them Apart: Four Tests That Work
Telling pounamu from other greenstone requires close attention. Three features separate the stone.
Color range. Pounamu has five named varieties. Kawakawa is a forest green with flecks, the most common. Kahurangi is translucent, pale green, and rare. Inanga is a grey-green named after a native fish. Tangiwai is a translucent bowenite with a glassy look, from a single source near Milford Sound. Kōkōwai contains red flecks from iron oxide. Jadeite and serpentine can mimic these colors, but they lack the same depth and internal cloudiness.
Hardness and feel. Pounamu is nephrite, a silicate of calcium and magnesium that registers 6.0 to 6.5 on the Mohs scale. It feels greasy to the touch, not waxy or glassy. Serpentine (Mohs 2.5 to 5.5) scratches easily. Jadeite (Mohs 6.5 to 7.0) feels colder against the skin and rings differently when tapped.
Internal structure. Nephrite forms in fibrous, interlocking crystals. This gives pounamu its toughness, the same quality that allows it to be carved into thin, fine shapes like the hei tiki without shattering. Serpentine shatters. Jadeite fractures more cleanly. Hold the stone up to a strong light. Pounamu shows a cloudy, fibrous interior. Greenstone jadeite shows a granular, crystalline one.
The sound test. An experienced carver taps the stone with a metal tool. Pounamu produces a dull, high-pitched ring. Serpentine thuds. Jadeite rings brighter and longer.
What the Names Mean in Practice
| Source | Term | What It Is |
|---|---|---|
| New Zealand South Island rivers | Pounamu | Nephrite, bowenite, rare serpentine from legally protected sources |
| British Columbia, Canada | Greenstone (or BC jade) | Nephrite, often darker and more uniform than pounamu |
| Myanmar (Burma) | Greenstone (or jadeite) | Jadeite, harder and glassier than nephrite |
| Cornwall, England | Greenstone (or Cornish greenstone) | Serpentine, soft, often with white veins |
| Any other source | Greenstone | Whatever green rock the seller chooses |
A carver in Greymouth turns away Canadian jade. It is good stone, he will say. But it is not pounamu.
Why the Distinction Matters
The legal difference carries consequences. Under the 1997 Protected Objects Act, pounamu cannot be exported without a permit. The stone is considered taonga (treasure) under Māori custom. Selling a piece labeled “pounamu” that is actually Canadian nephrite or Chinese serpentine is fraud under New Zealand consumer law. The buyer has purchased something the seller had no right to name.
The cultural weight is heavier. Pounamu holds whakapapa (genealogy) in Māori tradition. A carved hei tiki or mere (club) carries the history of the river it came from and the carver who shaped it. Wearing pounamu is not decorative. It is a statement of connection to place and people. Wearing imported greenstone pretending to be pounamu is, from the Māori perspective, a form of theft.
One elder told a collector that the stone knows where it comes from. She was not speaking metaphorically. Pounamu retains a physical memory in the form of its mineral impurities: traces of chromium, nickel, and iron that form patterns no geologist can fake.
Common Misconceptions
All green jade is pounamu. False. Pounamu is one variety of nephrite jade, and not all nephrite is pounamu. Canadian nephrite, Russian nephrite, and Chinese nephrite are all types of greenstone, none of them pounamu.
Pounamu is the same as jadeite. False. Jadeite is a different mineral, rarer, harder, and more expensive. Burmese jadeite is the “imperial jade” of Chinese carving. Pounamu is nephrite, not jadeite.
Dark green is always the most valuable pounamu. Kahurangi (the pale, translucent variety) fetches the highest price among collectors, sometimes more than kawakawa. The most prized pounamu is the rarest, not the darkest.
Greenstone from anywhere is just as good. For carving, toughness matters more than hardness. Pounamu’s fibrous structure allows it to be carved into shapes that serpentine cannot hold. For spiritual or cultural use, provenance determines value. A Canadian nephrite pendant does not carry the same weight as a pounamu one.
Pounamu can be found on the beach. A few pieces wash up on the West Coast, but most pounamu is collected from riverbeds. Beach stone is often weathered and brittle. The best pieces come from the active rivers: the Arahura, the Taramakau, and the Kawatiri.
FAQ
Is all pounamu considered greenstone? Yes. All pounamu is greenstone, but not all greenstone is pounamu. The terms are not interchangeable.
Can I legally take pounamu out of New Zealand? You can export pounamu with a permit from the Ministry for Culture and Heritage, provided it was acquired legally. Commercial exports require proof of Ngāi Tahu consent.
How can I tell if my greenstone pendant is real pounamu? Hold it to a strong light. Real pounamu shows a cloudy, fibrous interior. Serpentine appears opaque, jadeite granular. A carver or a gemologist with experience in New Zealand stone can confirm the provenance.
Why is pounamu more expensive than other greenstone? Supply is limited. Pounamu comes from one river system under controlled extraction. The cultural value adds to the price. So does the skill of the carvers, who train for years.
Can pounamu change color over time? Yes. Oils from skin and handling darken the stone over years. A kawakawa pendant worn daily may shift from light forest green to deep olive within a decade. This is considered natural, not a flaw.
Is pounamu traditional only to Māori carvers? The stone is taonga to Māori, but non-Māori New Zealanders carve it with the permission of Ngāi Tahu. Outside New Zealand, carving pounamu without cultural context is seen as appropriation.
The carver who told the collector that the stone knows where it comes from was right in a different way than she intended. Pounamu carries its history in its chemistry: the chromium that gave it green, the river that polished it, the hands that shaped it. Greenstone carries only its color. The difference is in what you choose to wear, what you choose to believe, and whether you can tell.
The Arahura River still runs milky with glacial silt. The stone still washes down. It waits for someone to notice that not everything green is pounamu.
Related reading: Talismans and Amulets | Hei Tiki: Meaning and History | Glossary: Pounamu (nephrite jade)