This mineral is called pumice . People like to mine for pumice in places like NewMexico , Japan and more places .Pumices luster is glass . Pumice can be many colors like tan or gray . Pumice has no streak because it is not one mineral .
Pumice is a fairly hard mineral it hits a 6 on the Mohs scale . Pumice can not be broke in a streagh cut line . Pumice can be used for hand soap dentists use it and you can use it on your feet . Pumice is made up of wood mostly carbon it has some water to and more !
Video link http://www.youtube.com/watch?v=WEMQPHwrvl8&feature=youtube_gdata_player
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