At the Hillsborough Castle in Northern Ireland, Kate attended a garden party on June 14, 2016. She wore these Eden Flower earrings in citrine.
The citrine version does not appear on Kiki McDonough’s website. It is widely believed that these earrings are bespoke.
The website offers a Lemon Quartz version.
Here is the closeup:
A flower shaped diamond stud with a hollowed out center is connected to a round citrine drop set in a white diamond halo setting. The earrings are set in yellow gold. A single bezel diamond is suspended between the stud and the drop.
Here they are on Kate.
Since these were bespoke, we don’t have a confirmed price, but the Lemon Quartz earrings retail at £2,900. I am assuming that is their cost is close to that number.