From which matereal is the rosa build ??

[fariana]

Bismillahir Rahmanir Raheem !!!
Assalamu 'Alaykum wa Rahmatullahi wa Barakatuhu wa magfiratuhu !!!

My son asked : I was there , it is no zemnt ,which matereal is it ??

And I want to add : Would it be eqal in paradies ??

Jazakumu Allah khairan !!!

Wa'alaykum 'Assalam wa Rahmatullahi wa Barakatuhu !!!