Natural pumice granules are commonly light in color, but depending on their composition, they can be white, cream, gray, green, or black; the latter two are often due to the predominant presence of iron. They are used in cosmetics (where they are known as pumice stone) and in industrial cleaning (stone washing). In construction, they are used to lighten concrete and as acoustic and thermal insulation, both in powder form and in blocks or panels; they are among the materials approved for green building. Other uses include horticulture, as an absorbent and filter for industrial oils, general surface cleaning, and as a light abrasive. They are used in restoration, primarily for finishing furniture with pad polishing, and also for sanding various surfaces (e.g., glass, marble, metal, etc.).
1 kg pack.
