Jewellery (British English) or jewelry (American English) consists of small decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, pendants and bracelets. Jewellery may be attached to the body or the clothes, and the term is restricted to durable ornaments, excluding flowers for example. For many centuries metal, often combined with gemstones, has been the normal material for jewellery, but other materials such as shells and other plant materials may be used. It is one of the oldest type of archaeological artefact -- with 100,000-year-old beads made from Nassarius shells thought to be the oldest known jewellery. The basic forms of jewellery vary between cultures but are often extremely long-lived; in European cultures the most common forms of jewellery listed above have persisted since ancient times, while other forms such as adornments for the nose or ankle, important in other cultures, are much less common.

Answer this question based on the passage: when was the first piece of jewelry made? Let's have some stream of consciousness first.
To answer the above question, the relevant sentence is: It is one of the oldest type of archaeological artefact -- with 100,000-year-old beads made from Nassarius shells thought to be the oldest known jewellery. So, the answer is 100,000 - year - old.