Steven Stone, London and Manchester-based Jewellers told Express.co.uk: “Wearing emeralds is said to promote friendship, peace, harmony, and domestic bliss by enabling the wearer to both give and receive unconditional love.
“In ancient Greece and Rome, emerald was said to be the gemstone of the goddess of love, Venus, which is perfectly fitting for the royal bride.
“Its original owner was Dame Margaret Greville, a famous society hostess who, upon her death, left her jewels to the Queen Mother.
“When the Queen Mother passed away in 2002, much of that collection, including the Kokoshnik tiara, went to Queen Elizabeth.
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source: express.co.uk