Agree. I love their emerald, but still hope they have a more substantial emerald tiara (even though they already have a massive collection). They have a "serious" sapphire, some "serious" ruby, a "serious" pearl and a "very very very serious" diamond tiara, why don't you get a "serious" emerald to complete your collection
.
Emerald version of the Mellerio:
https://imgur.com/a/0ciIQ2D (it looks like peridot rather than emerald but her brown eyes go well with green stones!)
Emerald version of another Mellerio:
https://imgur.com/a/tb1bsev
Maxima in Duchess of Angoulême's Emerald Tiara:
https://imgur.com/a/P25yLwK (This one probably is my favourite emerald among the unseen/unused tiaras)