Contrasting Textures Brown on White Modernist Bud Vase

Just a terrific hand thrown bud vase--elegant, modern, and earthy all at once. A reactive glaze gives the bottom half a rough, lava like texture, while from neck to opening it is perfectly smooth. The white is a bright, wintery white, with stony brown around the middle. Really nice. Signed on the bottom but I am not certain the maker. Excellent condition, with no chips or cracks, just a few tiny dark spots against the white, which may be original to the making. 5" tall x 3 1/2" diameter at widest; 7/8" across at opening.