Glass hemispherical mosaic bowl 2nd-mid-1st century B.C. Greek, probably Eastern Mediterranean Translucent purple, translucent light blue, opaque white, and opaque yellow.Slightly uneven vertical rim; convex side, tapering downward; slightly concave bottom.Composite mosaic pattern formed from polygonal sections of three canes: the first in a purple ground with a white spiral and central blue circle; the second in a blue ground with a white spiral and central purple circle, and the third in a blue ground with a yellow spiral, appearing green and central purple circle; a purple cane wound spirally with two fine threads in white and yellow is attached as a rim.Broken and repaired, with one patch of fill; some pitting and dulling, iridescence, and weathering, especially on rim.Rotary grinding marks on interior.The red, blue, and green mosaic glass of this exquisite bowl was fused, placed over a mold, ground, and then polished. Hemispherical bowls were an especially popular form of mosaic g