Circuit Court President Mr Justice Raymond Groarke had just ruled that the ring the Cranks had sold them in their Wicklow Street, Dublin, shop prior to their wedding in July last year was entirely unsuitable as a wedding band.
Physiotherapist Colm Daly and his wife, occupational therapist Hannah McDonnell, had told him they had been assured by the Cranks that the diamond-encrusted ring was entirely suitable as a wedding ring.
The judge heard how at dinner on the third evening of their honeymoon in Capri, the couple noticed that one of the diamonds was missing.
Ms McDonnell said she was devastated and had guests in their hotel "searching all over the place" for the diamond.
The couple gave evidence of having left the €450 ring back for repair and finding a different coloured diamond replacing the missing one.
They claimed the setting for the diamonds had also been damaged.
Both Noel and Maura Cranks, who live in Milltown, South Dublin, said they had pointed out to Ms McDonnell that the ring was unsuitable as a wedding band but she had her heart set on it.
They had repaired it as best they could and had returned it to the couple.
Judge Groarke said the ring should never have been sold as a wedding band and he had been told the application of super glue would have been necessary to keep the diamonds in their settings.
"Why in the name of goodness is any jeweller selling any ring to any purchaser without them noting that the application of super glue at some point or other will be required to hold the ring together and stop it from disintegrating," the judge said.
A purchaser of a piece of jewellery was entitled to be told that the item was so fragile it would have to be treated as a write-off if damaged.
He directed the Cranks defendant company, Ruth Eleanor Limited, pay the couple, now living in Southwark, London, €450 in exchange for the ring which was handed back in court, along with €350 for flights and expenses.
The couple, formerly of Kilcoskan, Killsallaghan, Co Dublin, were married in Tragliata, north of Rome, on July 19, 2011.
Following the court hearing Ms McDonnell said they would buy a new ring and have it blessed when exchanging their vows again.