WP Diamonds CEO, Andrew Brown, told Express.co.uk: “Carrie’s ring looks to be a 3-carat square-ish emerald, surrounded in an ornate pattern by approximately 2 carats of diamonds.
“Assuming the emerald has little-to-no treatment, the ring would likely retail for approximately £25,000 to 35,000.”
However, emerald is considered by experts to be a bad choice of stone for an engagement ring.
The green gems are thought to be too soft for everyday wear, making chips and scratches risky.
Diamonds, on the other hand, are incredibly hard – one aspect behind their rise to stone of choice for engagement rings.
READ MORE: Boris Johnson body language shows PM ‘floored’ by baby chat on This Morning