Why Blue Salt Is Blue?

A unique color, a unique story.

Blue salt is not just another seasoning, it's a visual and geological marvel. But why does it radiate with this captivating, earthy blue hue?

A Natural Crystal Phenomenon

The blue in blue salt is not due to dyes, additives, or any human process. Instead, the color forms deep below the surface over millions of years through high-pressure, long-forgotten sea bottoms, and mineral interactions that re-crystallize the lattice of the salt.

This modification of the crystal structure causes it to bend light differently, producing a bluish sparkle that can range from pale sky blue to dark, midnight blues depending on mineral density and angle of incidence.

The Mineral Factor

Several key minerals play a part in this natural variation:

• Potassium: Too much potassium gives salt a blue or violet color. It is also the key electrolyte responsible for muscle and blood pressure regulation.

• Magnesium & Calcium: These two minerals react with the salt over time, altering its physical state and increasing its reflective properties.

• No Iron Oxide (in contrast to pink salts): Unlike Himalayan or pink salts, blue salt's color is not because of rust-like iron compounds but because of optical effects in the crystal matrix.

Blue Salt: A Light Trick of Nature

Just like glaciers appear blue or gemstones return certain wavelengths of light, blue salt bends light in strange ways. As light passes into the salt crystal, it is slowed, scattered and the internal angles of the salt bounce back mostly shorter, blue wavelengths.

That's why Eupherbia's blue salt appears so visually striking under sunlight, it's not just colored, it's light-interacting.

Eupherbia's Rare Blue Salt

We employ at Eupherbia only natural, blue-colored mineral salt, never colored, never processed, and always imbued with essential minerals. Employed for culinary or spa rituals, its seductive blue hue offers a vintage luxury with geological roots.

A single pinch tells a story, of light, of earth, and of time.