Translation: I don‘t speak Icelandic.
Chill the Icelandic Gabbro-rocks in a freezer for at least two hours.
Place 2-3 rocks in a glass and pour the drink they are sufficient to cool a double measure.
The drink is chilled without being diluted.
Wash them rocks and let them dry before placing them back in the freezer.
Nine Gabbro-rocks in each package.