NECKLACES arranged by most recent to earliest worn from its FIRST appearance starting Engagement Day.
G. COLLINS AND SONS DIAMOND AND TANZANITE PEAR PENDANT
This pendant has matching earrings. It is set in platinum.
Mar 13, 2015 Commemoration Service for troops who served in Afghanistan: http://www.zimbio.com/photos/Kate+Middleton/Service+Commemoration+Afghanistan/S0y74BXs291
G. Collins and Sons: http://www.gcollinsandsons.com/diamonds-jewellery/pendants-necklaces/tanzanite-diamond-pendant
Thanks to My small obsessions Facebook page for the ID of this necklace.
MONICA VINADER RIVA DIAMOND CLUSTER BIB NECKLACE
Oct 21, 2014 Natural History Museum Awards: http://www.zimbio.com/photos/Kate+Middleton/Kate+Middleton+Natural+History+Museum+Awards/gSXnU5vd6tz
ASPREY WOODLAND CHARMS
The Duchess is wearing a diamond acorn, a diamond oak leaf and a diamond mushroom from Asprey's Woodland collection.
April 20, 2014 Visit to Taronga Zoo in Sydney, Australia: http://www.zimbio.com/photos/Kate+Middleton/Duke+Duchess+Cambridge+Tour+Australia+New/nHe71FJofY4
April 22, 2014 Arrival at National Indigenous Training Acadamy in Ayers Rock, Australia: http://www.zimbio.com/photos/Kate+Middleton/Duke+Duchess+Cambridge+Tour+Australia+New/ze1YbUgOL1E
Credit goes to My small obsessions Facebook page for the ID on these charms.
The Duchess is wearing three of the charms on the bracelet belows as pendants.
To read more about Asprey's Woodland collection: http://www.asprey.com/slideshow.php/item/47
QUEEN ELIZABETH II'S NIZAM HYDERABAD NECKLACE
This necklace is a loan from Her Majesty. More info on necklace here: http://www.royalcollection.org.uk/microsites/royalwedding1947/object.asp?row=47&exhibs=NONE&grouping=
Feb. 11, 2014 The Portrait Gala: http://www.zimbio.com/photos/Kate+Middleton/Arrivals+Portrait+Gala+London/gR7mz4K3-xl
MAPPIN AND WEBB FORTUNE DIAMOND CIRCLE NECKLACE
Thanks to My small obsessions page for the ID: https://www.facebook.com/photo.php?fbid=565153140240222&set=pb.132426196846254.-2207520000.1392158721.&type=2
Dec 6, 2013 Visiting Children's Hospice: http://www.zimbio.com/pictures/vE21dlvn3yo/Kate+Middleton+Visits+Children+Hospice/28eolo5bFyw
Dec 11, 2013 National History Museum: http://www.zimbio.com/photos/Kate+Middleton/Kate+Middleton+Prince+William+Go+Museum/lwwIotpPlO_
Feb 14, 2014 The ICAP Art Room Opening: http://www.zimbio.com/photos/Kate+Middleton/Duchess+Cambridge+Attends+ICAP+Art+Room+Opening/QGA1canCkku
ZARA CRYSTAL NECKLACE
Dec 5, 2013 Attending the Film 'Mandela: A long Walk to Freedom' at Odeon Leicester Square: http://www.zimbio.com/pictures/3sg4Gqvw4SP/Mandela+Long+Walk+Freedom+Screening+Part+2/e27gXkqD6BQ
MERCI MAMAN CHARMS NECKLACE
Oct 25, 2013 Shopping at Zara: http://www.popsugar.com/Kate-Middleton-Shopping-London-Zara-Home-32265158#opening-slide
From description of website, it seems that this necklace with several charms was a gift from the company, Merci Maman.
Information of this ID comes from my subscription of HELLO! Magazine vol. 1316 p. 61
CARTIER TRINITY NECKLACE IN 18K
Jul 19, 2012 Visiting the National Portrait Gallery: http://www.zimbio.com/photos/Kate+Middleton/Catherine+Duchess+Cambridge+Visits+National/ZjIOGGEb5f7
Necklace from Cartier: http://www.cartier.us/#/show-me/jewelry/n7060000-trinity-necklace?tab=1
GOLD CHAIN LINK NECKLACE AND GOLD PLATED ACORN PENDANT WITH CHAIN
According to WhatKateWore blog, the gold-plated acorn pendant with chain is from designer Kristen Magnusson: http://www.wix.com/kristinmagnussonuk/1#!portfolio/vstc3=handmade-nature
Jul 8, 2012 Wimbledon Men's Finals: http://www.popsugar.com/Celebrities-Royals-Wimbledon-2012-23898007?slide=9
CHAIN BIB NECKLACE WITH BLACK BEADS
Jun 15, 2012 Performance at Kensington Gardens: http://www.popsugar.com/Kate-Middleton-Blue-Zara-Dress-Kensington-Garden-Pictures-23578347
Her necklace has a similar look to the one below:
DIAMOND AND RED STONE FRINGE NECKLACE
Thanks to My small obsessions facebook page, this necklace and matching bracelet is from Mouawad: https://www.facebook.com/photo.php?fbid=584595201629349&set=pb.132426196846254.-2207520000.1392161066.&type=2
The fringe elements only go around the front of the necklace very much like a bib.
This necklace has a matching bracelet.
Dec 19, 2011 The Sun Military Awards: http://justjared.buzznet.com/2011/12/19/prince-william-duchess-kate-the-sun-military-awards/
GOLD DISK NECKLACE
This is a different than the one worn Oct. 2010 and has three layers: a large hammered gold disk, medium-size polished gold disk and a gold ring.
Jun 30, 2011 Youth Reception in Rideau Hall, Ottawa: http://www.zimbio.com/pictures/0PkguXh2rHY/Prince+William+Kate+Middleton+Youth+Reception/wSSqKG6q7Ms/Kate+Middleton
DIAMOND CROSS PENDANT
Catherine wears a diamond cross pendant at The Order of the Garter Service
June 13, 2011 The Order of the Garter Service: http://www.zimbio.com/pictures/gtm0UdnUjRD/Royals+Attend+Order+Garter+Service/zVgM_SmI2q6/Kate+Middleton
She has had this diamond cross for many years. I first spotted it at the wedding of Hugh van Cutsem and Lady Rose Astor June 4, 2005.
Fresh and tanned from her honeymoon, Catherine wore what looks like a shell necklace when she met the Obamas on May 24, 2011.
May 24, 2011: http://www.zimbio.com/pictures/cvjpo9xhDJe/Barack+MIchelle+Obama+Meet+Prince+William/Zie8CZfAstZ/Kate+Middleton
TIFFANY AND CO. SAPPHIRE BEZEL AND DIAMOND STATION NECKLACE
Necklace worn on Catherine and Prince William's official engagement announcement, Nov. 16, 2010. The oval cabochon sapphire is set in yellow gold bezel. Two bezel-set diamonds on either side of the sapphire separated a chain. This necklace has matching earrings.
Nov 16, 2010 Meeting the press at Clarence House: http://www.zimbio.com/pictures/2Kx_DlgccBd/Clarence+House+Announce+Engagement+Prince/Ze5n8NQ2-qY/Kate+Middleton
This necklace and matching earrings were first seen at the wedding of Lady Rose Windsor and George Gilman July 19, 2008.
Thanks to the facebook page of What Kate Wore, the necklace has been as coming from Tiffany & Co. by Elsa Peretti. A similar necklace can be seen here: http://www.worthpoint.com/worthopedia/tiffany-co-18k-gold-diamond-sapphire-necklace
ASPREY 167 BUTTON DIAMOND PAVE PENDANT IN 18K WHITE GOLD
This disk pendant was worn Oct 23, 2010 before their engagement. I thought I'd include it here since the earrings worn at this event were worn on January 8, 2010 at another wedding.
Oct 23, 2010 Harry Meade and Rosie Bradford Wedding:
It looks like this disk has pave-set diamonds and a stone in the middle. It reminds me of a round evil-eye pendant. There are letters engraved on the side of the disk. I can make out the word 'BOND'.
July 1, 2011 Canada Day, Ottawa: http://www.ibtimes.com/articles/172977/20110701/kate-middleton-stunning-celebrates-canada-day-144th-reiss-dress-ottawa-fashionista-sylvia-fletcher-f.htm
July 22, 2011 Wedding Dress Exhibition at Buckingham Palace: http://www.zimbio.com/pictures/9CHrIUI0yUD/Buckingham+Palace+State+Rooms+Summer+Opening/kTvJpmoye9Z/Kate+Middleton
The earliest sighting of this pendant was June 3, 2006 at the Boodles Boxing Ball: http://socialitelife.com/enlargedimage?back_to=/kate-middleton-will-not-obey-prince-william-04-2011/boodles-boxing-ball&postid=5893862 and http://socialitelife.com/enlargedimage?back_to=/kate-middleton-will-not-obey-prince-william-04-2011/boodles-boxing-ball-2&postid=5893871
Thanks to What Kate Wore for identifying that this necklace is from Asprey's.
Here are pictures of the pendant in 18K yellow gold from Luxury Bazaar:
Dimensions: Length of the necklace is 18 inches, width of the pendant 15 mm and
drop of the pendant is 20 mm
Description: Cute Asprey 18K yellow gold and diamond button necklace and pendant, stamped 167 New Bond Street London. Total diamond weight is 0.40 ct.
The circumference of the disk is engraved with LONDON - 167 NEW BOND STREET
The matching earrings in 18K white gold also shows the engraving.