Lot 4. A post-Sassanian glass beaker, Iran, 6th-8th century; 4 1/8in. (10.5cm.) diam. Estimate GBP 2,000 - GBP 3,000. Price realised GBP 2,000. © Christie's Image Ltd 2010. 

Of deep hemispherical form cut with stepped bands of roundels forming a honeycomb lattice, the surface entirely covered with iridescence and encrustation.