Looking for information on styles of jewellery contemporary with the Accademia building.
Found this German portrait A Lady aged 29 in 1582. (That is later than the date of the building.)

In my copy of 7000 years of Jewellery, I came across a reference to niello (a fusible compound of silver, lead, copper and sulphur), popular as a black decoration on silver. Somehow incorporate this into a design?

Link to Niello

Should start sketching! Best way for me to work out ideas for style and materials.