The Jewellery Box

($5,200, 1stdibs)

'Rare Jugenstil pendant for Theodor Fahrner. It is stamped `FM' (Ferdinand Morawe) but the contemporary literature confirms Olbrich's authorship several times. Documented Olbrich jewels are extremely rare. Joseph Maria Olbrich was a founder member of the Vienna Secession in 1897. In 1899, at the invitation of the Grand Duke of Hesse, Olbrich set up the Artists' colony at Darmstadt, thereby intermingling the styles of Austria & Germany.' Enamel and chalcedony set in sterling silver ($10,331, 1stdibs).

'‘The Kingfisher’ is a rare and early example of Cooper going back to the roots of Medieval jewellery and re-interpreting late Roman and Byzantine jewels to create this unique design and superb necklace. Characteristic of his work is the use of 15 carat gold which he preferred because of the richness of the colour, rather than following the ideology of his contemporaries who worked mainly in silver.' ($79,897, 1stdibs)

Enamel, sapphire, pearls, turquoise, 14ct gold ($1,400, 1stdibs).