You have a Korean celadon vase of recent date. I figure it is made in the last 30 years. Celadon is the green base color the vase has. It was original developed in China in ancient time ( Shang dynasty ) and many emperors spoke highly of it because of its resemblance with jade ( same color ). In Korea the celadons produced under the Goryeo Dynasty (918–1392) are regarded as the classic wares of Korean porcelain.
Yours is a late production but it is of good quality. Prices of these modern wares are not so high.