I think Lydia is attempting to make her engagement ring seem similar to Claire’s stunning Art Deco style Heidi Gibson engagement/wedding ring (pictured below) by adding the Chupi halo rings on either side of her square diamond.
She has a perfectly beautiful engagement ring from Tiffany & Co, and there is absolutely nothing wrong with it and I sing those awful Chupi halo rings only serves to make it look cheap and tacky!
She would have been better off having the halo rings specifically designed around her square stone by a jeweller for that combination to look even halfway decent.
Not to worry though, any sparkle on those fingers will be lathered in copious amounts of skincare products, ByTerry CC Serum, foundation, self tanner, body oil, hairspray, and dandruff in no time, so it would just be a total waste of money, that I honestly believe, they do not have.