Kate wore these when she was on the North America tour in 2011.
From the website:
“These are a wonderful pair of earrings which we find never go ‘out of fashion’. They are easy to wear both by day and night. Comfortable to keep in the ears. The hoops themselves are 1.5cm with the leaf hanging off each hoop being 1.5cm so in total the earrings hang 3cm from the ear hole.
You can choose from our variety of different charms if you are not so keen on the leaves eg stars, shells, pistols… These also come in Silver (£88 for a pair) and this price (£126) is for the pair of earrings in gold plate. ”
The earrings consist of an endless gold plated hoop and a satin-finish leaf charm, also plated in gold. The leaves have a somewhat flat surface with a raised line running down the center of them. Etched into the leaves are slanted horizontal lines, giving it a more accurate depiction of leaves.
Here they are on Kate.
In Denmark for a UNICEF event (November 2011).
In Canada for a youth reception (June 2011).
In Calgary, Canada in (July 2011.)
These are still available for sale at Vinnie Day and they are £126 or $179 USD.