![Pumice Stone Pumice-Stone](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKzXMaPycReF_cedQoq7w9RFKVloHH24lzWBx9AjV0tvdNhqQ5sGYL5yXagK9JCi0cAHbCguBS4nB5wJztmoadWJ99UtGTOo2rSRZideKfbig9iKPZfJ6IBD0v6_ENleJTJ5oDvMEtR30/s320/Pumice+Stone+2.jpg)
![Pumice Stone Pumice-Stone](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8NgZyoRu0n5w9aTaQT8e93zrCFUY42xlegHTifGJD3Un8N-p76l8Rk2IVZQkJfz1Zhhlk1GSN4fyzXUPRreGHIfr31gc_4oBH0an5Lq1YP1X4pzk28EXT_iPuc_HWuMoYKMWDoD5rUUk/s320/Pumice+Stone+1.jpg)
The unusual foamy configuration of pumice happens because of
simultaneous rapid cooling and rapid de-pressurization. Pumice Stone float on
water. Pumice Stone commonly originated from Indonesia
and Turkey.
Different sizes of Pumice Stones are available, such as 2-5cm which known as
small Pumice Stone. 3-5cm which known as medium size Pumice Stone. And 5-7cm
which is known as Large size Pumice Stone. Chemical Composition of Pumice Stone
is Silica (SiO2) =70%, Al2O3=13%, Fe2O3=
2%, Na2O= 3.5%. The hardness of Pumice Stone in Mohr scale is 6. The
melting temperature of Pumice Stone is 15000˚ C and pH value is 8 and the
density is 2.313g/cm3.