Unique Hand Thrown Blue and Lavender Porcelain Vase

This is a very unique unusual hand thrown porcelain vase, planter or pot. It has a very rarely seen glaze that is graduated from dark blue to light blue to lavender. It has a real cool drip that goes down the one side giving it a lot of personality. The glaze is satin or matte and reminds me of a salt glaze, but not shiny. It is handthrown porcelain which is hard to find. Th bottom is signed Sandra. I am told it is a very difficult to accomplish. It measures 4.25 inches tall and 5.5 inches across the widest part. This piece is an auction piece so I don't know the age. It is very clean and in excellent condition, no cracks and no chips. The base has a few little rough spots that look like they are from the manufacturing process.