Some examples of jewelry from the 9th century – 1500:

Necklace, late 9th century
Grave 632, Birka, Sweden
The Viking Heritage 1996

Rings, gold, 1300 – 1400
Victoria and Albert Museum, London

Missale et Horae ad usum Fratrum Minorum, 1385 – 1390
BNF Latin 757, 258v.

Annular brooch, 14th century
British Museum, London

“Fede” type silver ring, 14th – 15th century
Private collection

Annular brooch, c. 14th/15th century
British Museum, London

Detail of Mary Magdalene, by Carlo Crivelli, c. 1480
tempera on panel, 152 cm × 49 cm
Rijksmuseum, Amsterdam

St Catherine of Bologna with 3 donors, by the Master of the Baroncelli Portraits, c. 1470 – 1480
Belgium, Bruges, oil on oak panel
Victoria and Albert Museum, London

Detail of Maria of Burgundy, attributed to Niklas Reiser, ~1500
painting on wood, 79 cm × 46 cm
Kunsthistorisches Museum Wien
If you know about missing informations of origin or copyright please let me know!