One of Kate's staffers bought these earrings from a boutique in Whitehorse. They are by a local Yukon designer and Kate wore them in Carcross. They are described by the designer:
This listing is for one pair of large sterling silver earrings inspired by the design of traditional all-purpose Inuit knife, the ULU - as seen worn by Catherine, the Duchess of Cambridge during her Canadian tour in Carcross Yukon in September of 2016. The ear wire is .925 sterling and are hypoallergenic.
The large earring measures 3cm in height and the Ulu blade is 13mm wide.