How to remove a stain from juice on the stone with hydrogen peroxide.
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A large colored stain is removed from rough stone with the use of hydrogen peroxide 35%.

https://outlet.marmi-pietre.com/pulizia-e-manutenzione-c-81.html

Hydrogen peroxide 35% remove stains due to all the organic substances of vegetable origin (fruit, wood) and also non-oily stains due to many other substances (soot, some inks of marker and other).

Hydrogen peroxide 35% does not remove rust stains, oil stains, limescale.

In its action hydrogen peroxide 35% emits only harmless oxygen.

Caution!!
Hydrogen peroxide 35% is irritating to skin and eyes.
Protect yourself with gloves and goggles during use.