We can see that the prongs are set in yellow gold, but the band itself is made of a different metal, possibly white gold but I am not sure.
The stone is most likely ruby, but other possibilities exist.
Matching her new earrings closely, Kate also wore this necklace on the first day of the 2017 Poland/Germany tour.
The necklace’s pendant looks like an oval version of her tanzanite pendant necklace. Small white diamonds frame the oval ruby stone in the center. The pendant looks to be set in white gold, and the chain looks to be made of white gold.
There is some discussion about whether or not this is a G Collins and Sons piece. It certainly looks like it, but we would need to wait for confirmation. I don’t think this is a set to go with her earrings because the settings are completely different.
On May 20, 2017, Kate wore these special edition earrings to her sister’s wedding.
Being that they are special edition, they are not currently available on the website.
They are composed of cushion cut morganite stones rotated 45 degrees and set in a halo of small white diamonds. The post is set in gold. Below this is a bezel diamond suspended above the large oval drop, similar to the posts’ design (morganite surrounded by tiny white diamonds.
Here they are on Kate:
I estimate these cost more than $5,000. Many similar Kiki styles run up to that price.
On March 28, 2017, Kate wore these earrings to the National Portrait Gallery in London.
“Stunning pear drop green amethysts and pretty round pink tourmalines surrounded by delicate diamonds set in 18ct yellow gold make these truly beautiful earrings.”
A round pink tourmaline stone is set in a halo of white diamonds. Just under this is a single bezel diamond, and below that is a large pear shaped green amethyst stone, surrounded by small white diamonds.
Here they are on Kate:
These were customized for Kate, so her pair are not available for sale to the general public. The bottom stone is also different in shape from the stock image provided by Kiki.
The cost of the ones listed on the company website are £5,340. Given the size of Kate’s earrings and the material composition, I would estimate hers cost a similar amount.
Kate wore these unidentified earrings to Middle Temple on October 8, 2012.
Here it the closeup:
There is some debate as to whether these are brown or dark red drops. They could be brown, but given that Kate usually coordinates her jewelry to match her outfit, I think it’s likely they could be dark red, perhaps garnet.
They are gemstone drop earrings set in yellow gold. Judging by the way the gold glistens, this could be goldplated brass. I think it’s not solid gold.
Cataloguing Kate’s jewelry collection wouldn’t be complete without a post about her engagement ring.
As many already know, Kate’s ring used to be belong to her late mother-in-law. In 1981, Lady Diana Spencer chose the stone “from a selection presented to her by the then Crown jewellers Garrard of Mayfair. It cost £28,500 but, unusually for a choice by a member of the Royal Family, it was not unique and any member of the public could buy the same ring from the Garrard catalogue”. *
The ring was made by Garrard in London, and consists of one large oval Ceylon sapphire surrounded by 14 solitaire diamonds. It is set in white gold.
Some reports state that the sapphire is 12 carats. However, Ayvee of Diana’s Jewels believes that it may be 9 carats.
Here it is on Kate:
The ring was thought to be priced at £28,000 in 1981. Today, it’s deemed to be worth £250,000 or more, placing it just at the $500,000 mark.