Prince William reportedly wants all ivory in the Royal Collection at Buckingham Palace to be removed and destroyed.
The collection contains some 1,200 artefacts containing ivory, dating back hundreds of years.
Days after the Duke of Cambridge gave his backing to a campaign against elephant poaching, leading primatologist Jane Goodall told the Independent on Sunday (IoS) that William had told her he would "like to see all the ivory owned by Buckingham Palace destroyed".
William's father, the Prince of Wales, has reportedly asked for all ivory items at his Clarence House and Highgrove homes to be removed from sight during the past few years.
A spokesman for the Duke refused to confirm or deny any private comments he is said to have made.
Last week, William leant his influence to a campaign against elephant poaching when he addressed a symposium of leading conservationists gathered by his United for Wildlife umbrella organisation.
In a videoed speech, he and Charles also called on the world to turn its back on illegally traded animal parts like ivory and rhino horn.
On Thursday, William, Charles, Prince Harry and Prime Minister David Cameron attended the world's largest conference on the illegal trade in wildlife, held in London.
About 46 nations and 11 international organisations were at the Illegal Wildlife Trade conference, at which world leaders agreed on concrete steps to help safeguard endangered animals from poachers.
Illegal trade in animal parts such as rhino horn, tiger parts and elephant tusks is worth more than an estimated STG11.5 billion ($A21 billion) a year.
