Irish police uncovered a number of items in Rathkeale, Limerick as part of its investigation into organised criminal trafficking.
The police swoop was part of Operation Oakleaf run by the Criminal Assets Bureau.
It searched seven private residences and four premises. During the course of the searches two men were arrested by local Gardai for minor public order offences.
The investigation relates to suspected criminal activity by an organised crime gang operating in Ireland, the UK and Europe.
A spokeswoman for the police confirmed that an ornate cup was among the items seized but, while it is thought to be a Chinese rhino horn libation cup, she could not yet confirm what it is made of until tests are carried out. Other items seized included watches and jewellery.
The gang, known as the Rathkeale Rovers, have been linked with thefts of rhino horn items in the past.