Ember & Grain · Field Notes · Salts · Origin Atlas · Nº 07
Persian Blue
salt of a vanished sea
Semnan, northern Iran. Rock salt from deep in the mountains, laid down by a sea that dried up a hundred million years ago.
35°34′ N · 53°24′ E
East of Tehran the road runs along the dry southern face of the Alborz. The mountains are bare and the color of old bone. Below them the great salt desert, the Dasht-e Kavir, runs on to the edge of sight. In Semnan Province there are mines in these hills, and deep in the rock, among the white salt, a few seams run blue.
Field notes
| Origin | Semnan Province, northern Iran |
| Position | 35°34′ N · 53°24′ E |
| Type | Fossil rock salt (halite) |
| Method | Mined and sorted by hand |
| Minerals | Potassium, calcium, magnesium, iron |
| Taste | Sharp, then mild and citrus |
| Availability | Field notes only; not for sale |
Continue in The Origins Atlas
The rest of this chapter lives in the book: the full story of the place, how the salt is made, the people who keep the tradition, and the hand-drawn map.
- The Place · an ancient sea
- The Mine · by hand, in the dark
- The Sea
- The Blue · light in the stone
Sources: Weqook; FossilEra (blue halite); Persian Basket; Cofrapep. Imagery is illustrative and AI-generated.