Rockwool is made by melting a combination of rock and sand and then spinning the mixture to make fibers which are formed into different shapes and sizes.
(Rockwool; is made; ) (Rockwool; by melting; a combination of rock and sand) (fibers; are formed; into different shapes and sizes)
Rockwool Rockwool fibers
is made by melting are formed
a combination of rock and sand
into different shapes and sizes