About the Brand

The Original French Alum Stone

Since 1878, Feret Perfumeur has been producing the original, 100% natural alum stone Bloc Hyalin with the same constant concern for authenticity, impeccable quality and respect for your skin.

Centuries of Tradition

Multiple properties of alum stone have been known since ancient times: softening, moisturizing, astringent, cauterizing, anti-bacterial, non-allergenic and anti perspirant. The absence of perfume, alcohol and parabens results in a product that does not stain clothing.

Made By Hand
For Over 130 Years

Handcrafted in France, each Bloc Hyalin alum stone is unique. As a natural stone, Bloc Hyalin emphasizes its composition (Potassium Alum), rather than its appearance. Your Bloc Hyalin is yours alone.

View Bloc Hyalin product details

Safe And Natural Freshness

After showering or bathing, simply pass Bloc Hyalin over your still damp skin for 5 to 10 seconds. An active but invisible film is formed by millions of micro-crystals, providing a natural feeling of freshness and ensuring effective protection.

No Chemicals

Safe and all natural, Bloc Hyalin consists entirely of 100% potassium salt, purified to have all impurities removed. Conversely, lower quality products that resemble Bloc Hyalin are often made in Asia and composed of “Ammonium Alum” or “Potassium synthesis” – materials that are synthetic in origin and products of the heavy chemical industry.

THE ORIGINAL FRENCH ALUM STONE

Since 1878, Feret Perfumeur has been producing the original, 100% natural alum stone Bloc Hyalin with the same constant concern for authenticity, impeccable quality and respect for your skin.

CENTURIES OF TRADITION

Multiple properties of alum stone have been known since ancient times: softening, moisturizing, astringent, cauterizing, anti-bacterial, non-allergenic and anti perspirant. The absence of perfume, alcohol and parabens results in a product that does not stain clothing.

MADE BY HAND
FOR OVER 130 YEARS

Handcrafted in France, each Bloc Hyalin alum stone is unique. As a natural stone, Bloc Hyalin emphasizes its composition (Potassium Alum), rather than its appearance. Your Bloc Hyalin is yours alone.

View Bloc Hyalin product details

SAFE AND NATURAL FRESHNESS

After showering or bathing, simply pass Bloc Hyalin over your still damp skin for 5 to 10 seconds. An active but invisible film is formed by millions of micro-crystals, providing a natural feeling of freshness and ensuring effective protection.

NO CHEMICALS

Safe and all natural, Bloc Hyalin consists entirely of 100% potassium salt, purified to have all impurities removed. Conversely, lower quality products that resemble Bloc Hyalin are often made in Asia and composed of “Ammonium Alum” or “Potassium synthesis” – materials that are synthetic in origin and products of the heavy chemical industry.