Australia's 'oldest continuously-run' jeweller closed its doors after 165 years. Image courtesy: Leonard Joel

Kirsten Allbrecht, Kozminsky owner

John D'Agata, Leonard Joel national head of jewellery

A 15-carat yellow gold necklace from the 1860s was also on display. Image courtesy: Leonard Joel

The art deco necklace, comprised of 123 graduated old brilliant cut diamonds, was sold for $27,280. Image courtesy: Leonard Joel

A vintage diamond ring was also on offer. Image courtesy: Leonard Joel

An antique emerald and diamond ring set in yellow gold formed part of the Kozminsky auction. Image courtesy: Leonard Joel