Pumice is a stone which does not sink in water. It is formed of lava and some air bubbles trapped in it. Due to the presence of air bubbles it does not sink in water.
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Foam (jhaag) is a type of stone that floats on water and does not sink.
they saw each other (love at 1st sight?)
A foam rock
chokha
jal he to kal he jal nahi to kuch nahi
pani hamari zindagi mein bohut zaruri hai pani nahi hai toh hum abi zinda nahi hote thai . pani se hamare rooz ke kaam hote hai jaise kapre dhona , nahana aur bohut si cheeze hai hum sab ko pani ka sahi se istamal karna chahiye" jal mein kal hain"