Which of the following artefact has not been found at the Indus Valley Civilisation sites?

Diamond jewellery

The correct answer is Option (1) → Diamond jewellery

At Indus Valley Civilisation sites, archaeologists have found:

• Faience pots (a glazed material widely used for beads, bangles, and vessels),

• Gold jewellery (ornaments like necklaces, bangles, and earrings),

• Shell objects (such as bangles, decorative items, and tools).

However, diamond jewellery has not been discovered at Harappan sites.