Fan account _hrh_duchess_of_sussex uploaded a picture of Meghan's sleek ponytail from her second day of tour to Instagram.
The account pointed out that Meghan was wearing Natalie Marie earrings.
As the royal couple visited the rural town of Dubbo, Meghan opted to wear a sleek ponytail.
She paired the look with Outlander black skinny jeans, a white shirt, a blazer from Serena Williams collection and black boots.
The fan account captioned: "Meghan appears to be wearing the Natalie Marie "Diamond Sun Studs" today."
Princess Eugenie, who also has an Instagram account, "liked" the picture.
It seems the royal pair don't harbour any resentment, as has been previously reported.
A source told RadarOnline following Meghan and Harry's announcement to their close family members, "Eugenie disappeared for a while after Harry and Meghan told the royal family the news.
"She felt furious at having been upstaged again by Harry and Meghan."