Taylor Swift has announced her engagement to her partner Travis Kelce, sharing a series of pictures, including one of the ring, on Instagram. The post was accompanied by the caption: Your English teacher and your gym teacher are getting married. Not every English teacher can afford a diamond ring costing six or even seven figures, however. Fans and curious onlookers have been sharing their opinions on the proposal and the eye-catching ring.

Kelce is reported to have designed the ring with a jeweller, with its vintage-inspired style seeming to match the aesthetic of Swift's newly announced album The Life of a Showgirl. Industry experts have estimated it could cost anywhere from £500,000 up to £4m, said Ruth Faulkner, the managing editor for Retail Jeweller magazine. The diamond looked to be an 8-10 carat vintage stone, which Ms Faulkner said is quite rare for an antique piece. Jewellery journalist Rachael Taylor said the softer sparkle on the stone was likely because it was an antique cut by hand rather than by machine. She added that Swift's ring plays into a trend towards vintage styles with different cuts and oversized stones, which fits into the singer's romantic aesthetic. Whenever a celebrity gets engaged, if their ring is particularly standout, it's always going to spark a bit of interest in that, Ms Faulkner added.

General trends have been leaning towards bigger stones for celebrities and the public alike - but stars are opting for statement pieces to set them apart, Rhona Fitzpatrick, the founder and CEO of the Diamond Expert, told BBC News. Rings spotted on different celebrities' fingers this year - such as Zendaya's unusual horizontally set diamond and Dua Lipa's round diamond on a chunky gold band - show a preference for a larger stone in a less traditional setting. Even when celebrities stick to trends - such as big, oval diamonds - they tend to do it in an extravagant way which is harder to replicate.

Cristiano Ronaldo's partner, Georgina Rodríguez, made headlines when she shared a picture of the ring she received from the footballer earlier this month. The huge, oval cut rock is reportedly worth up to $5m (£3.7m), Ms Fitzpatrick said. It's not the kind of ring you'd be popping to Tesco with, she added. Following Rodríguez's announcement, some bridal jewellery suppliers started to bring out their own takes on the ring. Shoppers have increasingly turned to repurposing vintage pieces to create something more bespoke, Ms Faulkner said.