reef ceramic?

[Fuzzy]

Ive heard of this thing called reef ceramic. What is it made of? Were do u get it?
thnx in advance
heres a pic of it i found http/home.quicknet.nl/qn/prive/brandsma65/

 

[ste2k3]

looks good. I would think that it would be made out of either a plaster/concrete type thing or fibreglass.