georgette

georgette-kangas A thin lightweight silk or cotton fabric with a matte finish.
*1952, (w), Martha Quest, Panther 1974, p. 73:

Martha began sarcastically to explain why it was that even if she had been twelve she could not have worn this pink frilled georgette to the Van Rensbergs' house, since nice little English girls were not for export.

Silk chiffon and silk georgette. Two thin, thin materials that cannot be confused with each other.