Ancient Glass

Physical identification

Blown, cast, core-formed and molded glass. Record dimensions, weight, manufacture, surfaces, repairs, labels, mounts and inscriptions before cleaning or treatment.

Key cautions

• Flaking iridescence can be unstable.
• Do not tape cracks or use household glue.
• Support vessels from below.

Provenance and lawful movement

Document texture, joins, deposits, corrosion, movement and prior treatment. Stop handling when surfaces powder, flakes lift, corrosion appears active or cracks move.

Authenticity and conservation

Condition and authenticity can be intertwined. Artificial deposits, modern joins and restored surfaces may disguise manufacture. No single photograph, certificate or test proves the complete history of an object.