Yes, mined salt can be edible, but it requires processing.
Understanding Mined Salt
Mined salt, often referred to as rock salt, is naturally occurring salt found in underground deposits. These deposits are formed over millions of years through the evaporation of ancient seas. While these salt deposits are the source of much of the salt we use, they typically contain impurities and are not suitable for direct consumption.
The Need for Processing
- Impurities: Rock salt contains various impurities like clay, minerals, and other sediments. These impurities can make the salt unpalatable or even harmful if ingested in large quantities.
- Reference Confirmation: According to a reference, "Some rock salt is edible, but only after the impurities have been removed." This reinforces that raw, mined salt needs processing.
How Mined Salt is Processed for Consumption:
- Mining: The rock salt is extracted from underground mines.
- Crushing: The mined salt is crushed into smaller pieces.
- Dissolving: The crushed salt is dissolved in water.
- Purification: Impurities are removed through various processes like settling and filtration.
- Evaporation or Recrystallization: The purified brine is evaporated, leaving behind refined salt crystals.
- Iodization (Optional): Iodine is sometimes added to prevent iodine deficiency.
Table: Mined Salt vs. Table Salt
| Feature | Mined Salt (Rock Salt) | Table Salt |
|---|---|---|
| State | Raw, with impurities | Refined, purified |
| Edibility | Not directly edible | Edible |
| Processing | Requires purification | Processed, ready to use |
| Appearance | Variable, often grayish/brown | White crystals |
| Primary Use | Road de-icing, chemical use | Cooking, food preservation |
Practical Insights
- Industrial Use: A significant amount of mined salt is used for industrial purposes, such as road de-icing and as a raw material in chemical production.
- Food-Grade Salt: Only refined salt is suitable for use in cooking and as table salt. Look for labels that indicate the salt is food-grade.
Conclusion
Mined salt is not directly edible without undergoing a refinement process to remove impurities. However, once processed and purified, it becomes the table salt used in cooking and everyday life.
