Portable gold leaf electroscope, Sir Willli

Sensitive gold-leaf electroscope, Bohnenber

Ayrton's improved gold leaf electroscope, 1890.

Gold leaf on the cover of a book.

Ripe fruit and leaf of the Pear.

Ripe fruit and leaf of the Brunswick fig, Ficus carica.

Burial mask of Agamemnon, Greek, c 1550 BC.

Double salt with caster, c 1590.

Standing salt, Spanish, c 1630.

Alchemical symbolism, 1657.

Five pieces of struck ruby gold glas, 1968.

Ceramic with molybdenum/nickel/gold coating