History of Khewra Salt Mine: Himalayan Pink Salt's Origins
Every jar of Himalayan pink salt starts in the same place: deep underground in Pakistan, at the Khewra Salt Mine. From ancient seabeds it's ended up in kitchens, spas and wellness routines all over the world. The "Himalayan" bit is more marketing than map reading, though. Khewra sits in the Salt Range of Punjab, roughly 200 km south of the mountains that give the salt its name.
This is the full backstory: the geology, the discovery legend, the industrial era, and where things stand today. For what the salt actually is and how people use it, our complete guide to Himalayan pink salt pairs well with this one.
What Is the Khewra Salt Mine and Why Does It Matter?
The Khewra Salt Mine is the world's second-largest, behind the Goderich mine in Ontario, Canada, and the oldest and largest in South Asia. It sits near the foothills of the Salt Range in Punjab, Pakistan, and it's the main source of the rock salt sold worldwide as Himalayan pink salt.
Reserve estimates are all over the place, from around 82 million tonnes to as much as 600 million. The tunnels run about 40 km in total and reach some 730 m into the mountainside across many levels. It's an industrial site, yes, but also a record of deep geological time and centuries of labour, which is why researchers, historians and tourists all turn up.
Geological Origins: Ancient Evaporites
To understand why the salt is there at all, look back hundreds of millions of years. In the Precambrian era, shallow inland seas covered much of what's now Pakistan. Those seas evaporated, thick salt layers were laid down, and sediment buried them.
Then the same tectonic forces that shaped the wider region compressed and lifted the deposits, forming the Salt Range that holds Khewra today. What's left is a vast body of halite, sodium chloride, laced with the trace minerals that give the salt its character.
Quick Facts on the Salt's Formation
- Type: Halite (sodium chloride with trace minerals)
- Origin: Sedimentary rock from evaporated ancient seas
- Purity: Roughly 99% halite in the highest grades
The gentle pink to reddish hue comes from trace amounts of iron oxide and other minerals, which is what sets it apart from bright-white refined table salt.
Those iron-oxide traces are only part of a bigger mineral fingerprint. If you've ever wondered what the famous "84 minerals" actually do, our article on the trace minerals in Himalayan salt gives the honest, evidence-led answer.
A Historical Timeline of Khewra Salt Mining
The mine's history is a mix of legend, empire and industry. Here it is in order.
326 BC - The Discovery Legend
The story goes that the salt was first noticed around 326 BC, when horses in Alexander the Great's army were seen licking the rocks near Khewra during his campaign. It's anecdote rather than record, but it's the traditional starting point of the mine's story.
The Mughal Era - Organised Trade
Structured salt trade around Khewra grew considerably under the Mughals. Salt was pulled out with basic hand tools and traded across the region, which made it a valuable local commodity long before any industrial method arrived.
1872 - Modern Mining Begins
Large-scale mining began under British colonial administration. In 1872, the British engineer H. Warth designed and built the main tunnel that opened up the interior, and brought in the "room and pillar" method still used today. It carves out big chambers while leaving pillars of solid salt standing to hold up the roof.
Key Advances of This Era
- Construction of the main access tunnel into the mountainside
- Ventilation, drainage and structured haulage
- Expansion of output toward commercial and export scale
1947 to Today - Nationalisation and Growth
After Pakistan's independence in 1947, operations came under state control, later run by the Pakistan Mineral Development Corporation. Since then the mine has combined steady commercial output with a growing tourism trade and expanding exports to culinary and wellness markets.
Mining Techniques: Past and Present
Room and pillar is still central to how Khewra is worked. Roughly half the salt in any worked area is left standing as pillars to keep the chambers stable. That's a big part of why the mine has lasted so long.
Traditional Techniques
- Pickaxes and hand drills
- Oil lamps for lighting
- Manual carting of extracted salt
Modern Practices
- Electric drills and controlled blasting
- Improved ventilation and water management
- On-site sorting and packing for culinary-grade salt
From Mine to Table: How Khewra Salt Is Graded
Not everything that leaves Khewra goes to the same place. Once it's out, the rock gets sorted by colour, purity and crystal size, then routed to different markets. That sorting is why the pink salt in a gourmet jar can look and feel nothing like an industrial block.
| Grade | Typical Characteristics | Common Uses |
|---|---|---|
| Food-grade (premium) | Clean pink crystals, high purity, few inclusions | Edible fine and coarse salt, finishing salt |
| Decorative / lamp-grade | Larger natural chunks with rich colour banding | Salt lamps, tiles, cooking blocks |
| Industrial-grade | Lower-purity or off-colour rock | De-icing, chemical and industrial processing |
So the same mountainside supplies a delicate table seasoning and a solid cooking slab. Once you know how the salt is graded, the practical differences between everyday varieties get much clearer. Our breakdown of Himalayan salt vs table salt is a sensible next step, and if you want to separate real wellness benefits from marketing, there's our honest take on whether Himalayan salt is really healthier.
Cultural and Economic Impact
Khewra is more than an extraction site. It's a genuine cultural landmark and a serious tourist draw, welcoming up to around 250,000 visitors a year.
Cultural Highlights
- An underground chapel and mosque built from salt bricks
- Illuminated salt sculptures, including miniature replicas of famous monuments
- A salt-therapy chamber used by visitors with respiratory complaints
Economic Importance
- Produces more than 350,000 tonnes of salt each year
- Supplies edible, industrial and wellness-grade salt
- Supports local employment and national exports
Why the Mine's Heritage Still Matters When You Buy
Because "Himalayan" has turned into such a broad branding term, provenance is worth a check. Authentic Khewra salt should give its origin as the Salt Range of Punjab, Pakistan, and reputable sellers are open about grading and food-grade certification. If you're deciding between products, our Himalayan salt buying guide explains what genuine sourcing looks like on a label. You can also see how the heritage shows up in finished products across our edible salt range.
Frequently Asked Questions
How old is the salt in the Khewra Mine?
Hundreds of millions of years old, formed from ancient evaporated seas in the Precambrian era. That makes these some of the oldest worked salt beds anywhere.
Is the Khewra Salt Mine open to visitors?
Yes. It's one of Pakistan's best-known tourist sites, with guided tours, an underground chapel and mosque, salt sculptures and a salt-therapy chamber.
Why is it called Himalayan salt if it is not in the Himalayas?
The mine sits about 200 km from the mountains, in the Salt Range of Punjab. "Himalayan" is a regional branding term, not a precise location.
Is Khewra salt the same as the pink salt sold in shops?
Yes. The pink salt on supermarket and speciality shelves is overwhelmingly Khewra rock salt, just sorted into different grades and crystal sizes.
Final Thoughts
Khewra is a striking blend of deep geological history, human ingenuity and modern industry. From a discovery legend to the tunnels first opened in 1872, its story carries on in every jar of pink salt sold today. To browse products carved from this very rock, have a look at our salt tiles and bricks collection.
