Elegant Vase Bisque? Raised Relief Rose

This is such a simple, yet elegant vase. Shades of soft greens cover the vase's lovely textured finish. I'm not sure of the composition but it feels like a bisque. Finely done is the 7" raised relief rose that adorns the front of this 15" vase. The other 3 sides do not have roses. (The base and the top are 3 7/8" square.) What a lovely way to display your favorite flowers! Thank you for looking and email with questions please.