Antique Jewelry or Estate Jewelry (or Estate Jewellery), in a formal sense, is

jewelry Jewellery ( UK) or jewelry ( U.S.) consists of decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes. From a w ...

and often

timepiece A clock or a timepiece is a device used to measure and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month and the ...

s which are part of the 'estate' of a deceased person. More specifically, the term refers to second-hand or pre-owned jewelry, with the 'estate' appellation signifying that the item is antique, vintage or an otherwise considered a significant or important piece.

References

Types of jewellery {{fashion-stub