no its not stone but I am going to go with a softer type of plastic kinda waxy but its not wax I have no idea what its made out if but its not heavy... hope that helps sorry I couldn't help more there is no markings that I can see to indicate any authenticity
I dont know what the rose is made out of I am going to go with a softer plastic if that makes sense its not a hard plastic maybe like a waxy kind of material and I would consider GIN offers as long as there are no bids