Large agate

77S
Large agate bead
1-2 century AD
Parthian

Elliptical body with bi-conical hole, drilled from opposed ends.  Meticulously polished.
Intact, good condition. Extremely rare.

Max diameter: 16 mm
Length: 81 mm

For similar beads, but much smaller, see:
-Alexeeva E.M. Antichniye busi severnogo prichernomoriya, Academy of Science, Moscow, 1978, table 36: 31