From Seam to Container: How Himalayan Salt Is Mined and Processed

Published 2026-11-05 · 6 minute read · by Al Goher Trader

Where the Salt Comes From

All of our salt comes from the Warcha Salt Mines in Khushab District, Punjab, Pakistan, in the Salt Range. The deposit formed from an ancient sea that evaporated around 250 million years ago and was sealed under rock, which is why it is mined as rock salt rather than harvested from the coast. Our family has worked this area since 1990, and every product we export, from a 1.5 kg lamp to a bag of powder salt, starts at the same seam.

This article follows that salt step by step, from the mine face through Hamdani Salt Factory on Warcha Salt Mine Road in Quaidabad to a loaded export container. It is written for buyers who want to understand what they are paying for and what to ask a supplier.

Step One: Hand-Mining With Room and Pillar

Warcha crystal is extracted using the traditional room-and-pillar method. Miners cut chambers, the rooms, into the salt while leaving columns of untouched salt, the pillars, to support the roof. This keeps the mine structurally sound and lets work continue into the seam over decades.

We mine by hand rather than by blasting. Blasting is faster, but it shatters crystal, creates dust and waste, and makes it difficult to recover large, clean pieces. Hand extraction is slower, yet it lets experienced miners bring out the large blocks needed for tiles, slabs and big lamps intact, and select only the crystal worth shipping.

Step Two: Grading at the Seam

Grading starts underground. Each piece is judged by colour and clarity: signature pink, dark red-pink, rare white and gray. Clear, evenly coloured crystal is set aside for lamps and carved pieces. Large, dense, consistent blocks are earmarked for sawing into tiles, bricks and cooking slabs. Smaller pieces and material with more variation are destined for crushing into edible, bath and feed grades.

Getting this sorting right early matters to buyers. It is the reason colour stays consistent across reorders and why a lamp line or a tile order does not suddenly look different from the samples.

Step Three: Into the Factory

From the mine, salt travels the short distance to Hamdani Salt Factory, our own processing plant, opened in 1998 to bring cutting, grinding and crafting in-house. The factory runs around the clock with more than 10,000 tonnes of annual capacity. Because mine and factory belong to the same family business, there is no broker or re-trader in between, and quality decisions stay with the people who extracted the salt.

Inside, the work divides into four broad paths, depending on what each piece of salt will become.

Path One: Natural Lamps

Crystal chosen for natural lamps is shaped only enough to sit stably and look clean. Each rock is weighed and assigned to a weight band, from AGNSL-0014 at 1.5–2 kg through to the big lamps above 20 kg. It is then drilled for the bulb cavity and fitted with a wooden base, cord and bulb. Weighing each piece individually is what keeps the bands honest, so a carton labelled 3–5 kg averages near the middle of the band.

Path Two: The Carving Workshop

Blocks set aside for fancy lamps and candle holders go to the carving workshop. Carvers turn them into spheres, bowls, towers, animals, flowers and tealight holders, then smooth and finish each piece before it is drilled. Custom shapes are carved here against buyers’ drawings. Offcuts from carving are collected rather than discarded.

Path Three: Diamond Saws for Tiles, Bricks and Slabs

Large, dense blocks are cut on diamond saws into tiles, bricks and cooking slabs. Standard formats include 8×4×1 and 8×4×2 tiles and bricks, natural-face 8×4×2 bricks, 2×8×12 and 20×20×2 large formats, round pillar and 8 corner 6×6×2 cuts, and food-grade cooking slabs. These are dimension-critical products, so they are checked with calipers before packing. Builders of salt rooms and feature walls depend on consistent sizes, and a few millimetres of variation across hundreds of tiles shows up on the wall.

Path Four: Crushing and Screening

Salt for edible, bath and feed use is crushed and then passed through calibrated meshes that separate it by size. Edible grades are coarse 2–5 mm, granular 1–2 mm, refined (suji) and powder, in dark pink, light pink, white and black. White coarse 4–8 mm crystal is screened for foot baths. Loose granular, coarse and powder salt also goes to feed mixing, and compressed 4 kg licks are pressed for livestock.

This path is also where offcuts from tile sawing and lamp carving end up. Crushing them into usable grades means very little of what leaves the mine is wasted. The salt itself stays unrefined and additive-free, with no anti-caking agents and no bleaching.

Step Four: Quality Control and Lab Testing

Food-grade lots are independently analysed by the National Metrology Institute of Pakistan and the National Physical and Standards Laboratory. Published reports show 98–99% sodium chloride, heavy metals not detectable and no pathogenic contamination, within CODEX guidelines. Reports ship with every food-grade order. The edible line is Halal certified (PS 3733:2019) and Kosher certified (IDA-342:2020), and factory operations follow ISO 9001:2015 quality management.

For crafted products, quality control means checking weight bands, base stability, drilling and finish on lamps, dimensions on tiles, and overall presentation before anything is boxed.

Step Five: Packing for Sea Freight

Retail lines such as smaller lamps and candle holders are packed in printed unit boxes inside master cartons. Lamps from 7 kg upward are individually wrapped. Bulk salt moves in 25 kg or 50 kg bags or jumbo bags, and tiles and bricks are shrink-wrapped and palletised. Private-label boxes, labels, jars and grinder bottles are filled and sealed at the factory.

Step Six: Documents and Container Loading

Production for an order typically takes two to four weeks, depending on the product mix and container size. We then arrange container loading, sea freight and the document set: commercial invoice, packing list, certificate of origin, phytosanitary certificate and any destination-specific paperwork. A 20ft container carries roughly 24–26 tonnes of bagged salt or about 2,400–2,800 boxed lamps in mixed weight bands. From Karachi, sea freight adds roughly two to three weeks to the Gulf, four to five to Europe and five to seven to North America.

What This Means for Buyers

Knowing the process makes it easier to write a clear order and to judge quotes. Lamps priced by weight band only make sense if every lamp is weighed, so ask how bands are checked. Tiles for a construction project depend on sawing tolerances, so ask how dimensions are measured and how much variation to expect across a pallet. Edible salt depends on screening, so specify the grade by size, such as coarse 2–5 mm or granular 1–2 mm, rather than a loose description like fine or medium.

It also explains why consistency across reorders is realistic when the mine and factory are under one roof. The same people grade the crystal, run the saws and screens, and pack the cartons, so a repeat order can be matched to the previous one using the same product codes. When a supplier buys salt from several mines through traders, that link between seam and carton is much harder to keep.

Finally, the process shows where lead time goes. Carving, private-label printing and large tile cuts take longer than packing stock grades of bagged salt, so a mixed order with custom pieces should be planned with that in mind. Share your target delivery date when you request a quote, and the production schedule can be built around it.

Seeing the Process for Yourself

The best way to judge any salt supplier is to watch this chain in person. Wholesale buyers are welcome to visit the mine entrance at Warcha, walk the sorting floor, the saw line and the carving workshop, and watch their own selections being weighed and wrapped. If travel is not practical, samples with lab reports are available to serious buyers before they commit to an order.