Here's the little-known history behind Duchess Kate's sapphire blue engagement ring

Duchess Kate's blue sapphire and diamond engagement ring still remains every bit iconic to this day.

Many know that the ring holds a special place in the royal family's heart. It had belonged to Princess Diana and was given to Kate when Prince William proposed on a trip to Kenya in October 2010. Prince William said the ring (reportedly worth more than $500,000) was a "way of making sure my mother didn’t miss out on today and the excitement."

While rumor has it that Harry was initially supposed to receive their mother's ring, the inspiration behind the family heirloom is about a century-and-a-half long. 

See the stunning details behind the Duchess' engagement ring:

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Duchess Kate's engagement ring
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Duchess Kate's engagement ring
GLOUCESTER, UNITED KINGDOM - NOVEMBER 04: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge (seen with a sticking plaster on her left hand) departs after visiting the Nelson Trust Women's Centre on November 4, 2016 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - FEBRUARY 06: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge attends the Place2Be Big Assembly with Heads Together for Children's Mental Health Week at Mitchell Brook Primary School on February 6, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 09: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge attends the ICAP charity day at ICAP on December 9, 2015 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
Britain's Catherine, Duchess of Cambridge attends a ceremony to officially name Princess Cruises's new ship 'Royal Princess' in Southampton, southern England on June 13, 2013. The Duchess of Cambridge, as the ship's godmother, officially named the Royal Princess with a traditional blessing involving smashing a bottle over the ship's hull in what is expected to her final solo engagement before the birth of her and Prince William's child. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)
LONDON, ENGLAND - JULY 23: Catherine, Duchess of Cambridge carrying her newborn baby son departs the Lindo Wing of St Mary's Hospital with Prince William, Duke of Cambridge on July 23, 2013 in London, England. Catherine, Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William, Duke of Cambridge at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Karwai Tang/WireImage)
WINDSOR, ENGLAND - SEPTEMBER 02: Catherine, Duchess of Cambridge watches Great Britain Mixed Coxed Four Rowing - LTAMix4+ team celebrate after winning gold on day 4 of the London 2012 Paralympic Games at Eton Dorney on September 2, 2012 in Windsor, England. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge watches the Women's Teams Synchronised Swimming Technical Routine on Day 13 of the London 2012 Olympic Games at the Aquatics Centre on August 9, 2012 in London, England. (Photo by Adam Pretty/Getty Images)
LONDON, ENGLAND - JULY 30: Catherine, Duchess of Cambridge (Handbag detail) as she attends the UK's Creative Industries Reception at Royal Academy of Arts on July 30, 2012 in London, England. (Photo by Danny Martindale/WireImage)
LONDON, ENGLAND - JULY 30: Catherine, Duchess of Cambridge attends the UK's Creative Industries Reception at the Royal Academy of Arts on July 30, 2012 in London, England. (Photo by Ian Gavan/Getty Images)
LONDON, UNITED KINGDOM - FEBRUARY 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge's clutch bag, bracelet and engagement ring seen as she attends the 'Lucian Freud Portraits' exhibition at the National Portrait Gallery on February 8, 2012 in London, England. (Photo by Indigo/Getty Images)
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In 1840, Prince Albert wished to create something special for his fiancée, Queen Victoria. According to Vogue, the prince commissioned notable British jeweler House of Garrad to create a sapphire blue brooch with diamonds for his bride, a piece that soon became the queen's favorite. 

Sarah Prentice, the creative director behind Garrad, told Vogue that Victoria "loved it so much that she decided to wear it on her wedding day as her something blue on the front of her dress." She sported the piece up until Prince Albert's death in 1861, but ensured the brooch would become one of the royal family's many heirlooms.  

The Queen loves Victoria's brooch:

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Royal family's blue brooch
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Royal family's blue brooch
RIYADH, SAUDI ARABIA - FEBRUARY 17: The Queen In Saudi Arabia Wearing A Turban Hat During Her Visit To The Gulf States (Photo by Tim Graham/Getty Images)
Queen Elizabeth II leaves Buckingham Palace by car on her way to Runnymede to inaugurate the British memorial to US President John F. Kennedy.
QATAR - FEBRUARY 22: The Queen Visita A Junior School In Doha , Qatar During Her Tour Of The Gulf States (day Date Not Certain. Gulf Tour Dates 12 Feb - 1 March 1979) (Photo by Tim Graham/Getty Images)
President John Kennedy (right) with his wife (second left) Jacqueline, meeting Queen Elizabeth II and the Duke of Edinburgh on the American President's visit to Britain.
SOLOMON ISLANDS - OCTOBER 18: The Queen In The Solomon Isles During Her Official Tour Of The South Pacific Islands Wearing A Hat With Feathers (designed By Milliner Frederick Fox), Three-strand Pearl Necklace And The Empress Marie Feodorovna Of Russia's Sapphire, Diamond And Pearl Brooch. (Photo by Tim Graham/Getty Images)
HYDERABAD, INDIA - NOVEMBER 19: Queen Elizabeth II and Prince Philip visit Hyderabad in India. (Photo by Tim Graham/Getty Images)
Queen Elizabeth II visits IBA, Knightsbridge, London, August 1985. (Photo by Tim Graham/Getty Images)
UNITED KINGDOM - MARCH 27: The Queen On A Walkabout Outside Chichester Cathedral (Photo by Tim Graham/Getty Images)
ASCOT, UNITED KINGDOM - JUNE 01: Queen Elizabeth ll and Prince Philip, Duke of Edinburgh arrive at Royal Ascot in an open carriage on June 01, 1986 in Ascot, England. (Photo by Anwar Hussein/Getty Images)
WINDSOR, UNITED KINGDOM - NOVEMBER 20: The Queen At Home In The White Drawing Room In Windsor Castle (Photo by Tim Graham/Getty Images)
ACCRA, GHANA - NOVEMBER 07: The Queen Meeting The President Of Ghana, Flight Lieutenantjerry Rawlings On Her Arrival At Accra Airport. (Photo by Tim Graham/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 23: The Queen Visiting The Royal Homoeopathic Hospital, Great Ormond Street, London. (Photo by TIM GRAHAM/Getty Images)
BALMORAL, UNITED KINGDOM - AUGUST 07: Queen Elizabeth II attends a Garden Party at Balmoral Castle, on August 07, 2012 in Aberdeenshire, Scotland. (Photo by David Cheskin - WPA Pool/Getty Images)
BALMORAL, UNITED KINGDOM - AUGUST 07: Queen Elizabeth II attends a Garden Party at Balmoral Castle, on August 07, 2012 in Aberdeenshire, Scotland. (Photo by David Cheskin - WPA Pool/Getty Images)
LONDON, ENGLAND - DECEMBER 18: Queen Elizabeth II arrives at 10 Downing Street as she visits to attend a cabinet meeting on December 18, 2012 in London, England. (Photo by Chris Jackson/Getty Images)
ASCOT, ENGLAND - JUNE 17: Queen Elizabeth II attends day 2 of Royal Ascot at Ascot Racecourse on June 17, 2015 in Ascot, England. (Photo by Samir Hussein/WireImage)
BERLIN, GERMANY - JUNE 23: Queen Elizabeth II and Prince Philip, Duke of Edinburgh, arrive at Tegel airport on the first of their four-day visit to Germany on June 23, 2015 in Berlin, Germany. The Queen and Prince Philip are scheduled to visit Berlin, Frankfurt and the concentration camp memorial at Bergen-Belsen during their trip, which is their first since 2004. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - MARCH 08: Queen Elizabeth II smiles as she meets people being helped by the Prince's Trust at the Prince's Trust Centre in Kennington on March 8, 2016 in London, England. The Queen was visiting the Centre with Prince Charles, Prince of Wales to mark the 40th Anniversary of the Prince's Trust. TRH's saw the impact the Prince's Trust has on young people and heard about the six programmes run by the Trust to help disadvantaged young people ages 13 to 30 to get into education and employment. (Photo by Chris Jackson - WPA Pool/Getty Images)
ASCOT, UNITED KINGDOM - JUNE 16: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II attends day 3 'Ladies Day' of Royal Ascot at Ascot Racecourse on June 16, 2016 in Ascot, England. (Photo by Max Mumby/Indigo/Getty Images)
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Queen Elizabeth later inherited the beloved jewel, sporting it under her shoulder at a plethora of royal events over the years: garden parties, royal ascots, meetings with American presidents and foreign engagements were just some of the times the queen proudly showed off the antique.

And when it came time for Prince Charles to propose to Diana, the couple ended up selecting a "sapphire-and–diamond cluster Marguerite ring" from Garrad, a design that was almost identical to his mother's 19th-century royal blue brooch. 

"I would imagine growing up being surrounded by your mother and your grandmother [with] such beautiful, incredible jewelry...it would stick with you," explained Prentice to Vogue

Now, the world awaits the next royal engagement. We're waiting, Harry! 

h/t Vogue

Related: More royal facts we didn't know 

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13 fascinating facts you didn't know about the royal family
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13 fascinating facts you didn't know about the royal family

The Queen was actually really cool when it came to Prince William and Kate Middleton’s wedding

At first, Prince William and Kate Middleton received a list of more than 700 names—none of whom they knew. When Prince William approached his grandmother, she apparently said, “Get rid of it . . . . Start from your friends and then we’ll add those we need to in due course. It’s your day.” Ultimately, neither Tony Blair nor Gordon Brown, both former British prime ministers, were invited.

Getty

Prince Charles didn’t love Prince William and Kate Middleton’s first big trip together as newlyweds

Now, the Internet eats up any official trip taken by Prince William and Kate Middleton. (Just think of their recent jaunt in Paris, or their trips to Canada and India.) But Prince Charles thought that the couple’s first official tour as newlyweds, which included stops in Canada and California, had a few too many photo ops.

Getty

After Prince William and Kate Middleton got married, the dynamics within the royal family changed

Besides Prince Charles, the Queen and Prince Philip have three other children—Princess Royal Anne, Prince Andrew, and Prince Edward. They’re a nuclear family, but since Prince William and Kate Middleton have added to the next generation in line for the throne, the royal family has become somewhat two-tiered. An example of this came during the Queen’s Diamond Jubilee during a flotilla on the Thames. Prince William, Kate Middleton, and Prince Harry joined the Queen, Prince Philip, Prince Charles, and Camilla Parker Bowles on their boat. Princess Anne, Princes Andrew and Edward, and their families rode down the river separately.

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Prince Charles is not good with technology—and Prince Harry likes to tease him about it

Prince Charles responds to emails with handwritten notes. According to Smith, Prince Harry once jokingly said, “You’d get a lot more things done if you actually picked up the phone, or—guess what?—send a text message.”

Getty

Prince William and Kate Middleton used to live in a humble cottage, but their current residences each had an expensive renovation

Prince William had to duck down to walk around the couple’s previous home, because its ceilings were so low. However, after their wedding, their Kensington Palace apartment, which contains 20 rooms, underwent a $6 million renovation. Anmer Hall, the country home where they currently live, cost $2 million to renovate. As we’re well aware, Kensington Palace is undergoing another renovation ahead of the couple moving back full-time later this year.

PA

Kate Middleton got really into decorating her new home

Architect Charles Morris and interior decorator Ben Pentreath worked on Anmer Hall. According to Smith, the Duchess of Cambridge would type up notes of their conversations on her train rides. Like many homes today, the kitchen is the center of the house. When the Queen visited their home, she apparently said, “It’s extraordinary that they all live in the kitchen—only one room!”

Reuters

Prince Harry participated in at least one missile attack against the Taliban while he was deployed in Afghanistan

Prince Harry has done a fair amount of service, including being deployed to Afghanistan for a 4-month stretch. He was an Apache helicopter pilot and served as a copilot gunner in a missile attack on the Taliban.

Reuters

Camilla, Duchess of Cornwall was a big fan of Downton Abbey

Camilla may have been previously vilified as Prince Charles’s former mistress, but her down-to-earth nature and easy way with the press have won people over. Valentine Low, a reporter for The Times, had written a piece on Downton Abbey that contained spoilers. Camilla had read the piece, and when she noticed Low on her trip to Australia, she said to him, “Valentine, you ruined my Downton!”

PA

Kate Middleton once snuck into an art exhibition after-hours, almost like a regular person

The Duchess of Cambridge went to see a 2012 David Hockney exhibition at the Royal Academy of Arts. While there, she chatted normally with a lawyer and his son—who didn’t even recognize her.

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Prince Charles was hoping Princess Charlotte would be a girl

After Princess Charlotte was born in 2015, Prince Charles said, “I was hoping for a granddaughter—someone to look after me when I am very old.” We're not exactly sure if the second half of his comment was a joke or not.

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The butler of Princess Anne, the Queen’s only daughter, gets to wear jeans

Prince William and Kate Middleton may have a full-time staff, but they still have a lot less formal help than Prince Charles. In the book, one of William’s relatives is quoted as saying, “They will do it differently from his father, maybe not as informally as Princess Anne, who has her butler in jeans.”

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The Queen’s death is now more of an open topic

A recent long-form article in The Guardian discussed the secret plan for what will happen when the Queen dies. But among the royal household and the royal family, the Queen apparently believes that an open discussion is “healthy and important.”

Reuters

In many ways, Prince William is a lot like the Queen

Jamie Lowther-Pinkerton, former principal private secretary to the Duke and Duchess of Cambridge and to Prince Harry, says, “William is like his grandmother . . . . He gets on with his duty, dedicates himself to doing the job . . . . [He’s] looking at ‘the long game.’ ” The Queen, Lady Elizabeth Anson says, can see “continuity” with the couple.

Reuters

Can't get enough of the juicy secrets? Read more in "Prince Charles: The Passions and Paradoxes of an Improbable Life."
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