Gray/green plate glass; anodized sheets of plate glass; laminated, cut, ground, acid-polished. Two solid rectangular sections (large and small) relating to each other in "golden mean" proportions-placed 1/2" apart, long, thick side of smaller rectangle placed against short, thick end of larger; each section constructed of vertically laminated anodized plate glass cut in graduated triangles; sections have been ground to take a gradual pyramidal shape; smaller rectangle rises at a sharper angle and ends at a point one-third higher than the long rectangle apex; triangular ends of both sections are slightly angled apart from each other and have been polished smooth; top surface has been acid-polished to produce a semi-matte finish; inscribed on base edge: "Z. Bohus 1988".