Just stunning.

Although the sideways oval trend is predicted to be a major engagement ring trend next year, there's another style you might be seeing a lot of in 2018. As we know Kate Middleton's engagement ring is a stunning blue sapphire and rumours suggest that Prince Harry will choose a coloured stone to propose to his partner, Meghan Markle. There have been reports that Harry may pick an emerald and although this is all conjecture for now, it wouldn't surprise us if we were to see a lot more of this type of gem next year.

Our directional ring is made with an emerald that'll remind you of the summeriest grass, even if the ground's covered with snow. (It's happening soon. ?) With diamonds at the North, South, East, and West points. #ericaweiner1909

A post shared by Erica Weiner (@ericaweiner) on Oct 13, 2017 at 2:13pm PDT

Aside from sapphires which are currently the most popular choice for this type of ring and emeralds, pink sapphire stones are having a moment.

Lovely, more affordable alternative to #pinksapphireengagementring #spinels are an 8 in hardness on the Mohs scale and come in many lovely colors like this spinel in our #diamondhaloengagementring Www.etsy.com/shop/pristinejewelry

A post shared by Pristine Gemstone Jewelry (@pristinegemstonejewelry) on Jul 21, 2015 at 3:11pm PDT

Morganite is also becoming bigger and bigger and if diamonds aren't for you, the pretty peach-colour might grab your attention with Irish designer Chupi a massive fan of this particular stone.

You, Me & Magic ⚡️ This darling sparkler was the very first time I paired our blush pink Morganite with classic sparkling diamond sides and I just adore it ❤️ The sweet guy who was proposing knew his girl would love an alternative gemstone for her engagement ring but he wanted to make sure she had some diamond sparkle too ⭐️ She loved it! Morganite & Diamond became part of our collection ?

A post shared by Chupi Delicate Fine Jewelry ✨ (@chupi) on Aug 13, 2017 at 1:53pm PDT

Jewellers say that this type of ring is ideal for the bride who wants something a little unconventional that stands out from the crowd and there's a rise in rings that include two types of coloured stone if you want a completely unique design.

Check out our selection of Tanzanite jewelry on our sister website, www.TanzaniteJewelryDesigns.com -- #tanzanite #tanzanitering #lovetanzanite #tanzaniteblue #tanzanitejewelry #loverings #lovemyring #lovejewelry #engagementring #alternativeengagementring #gemstoneengagementring

A post shared by Moriarty's Gem Art (@moregems) on Oct 10, 2017 at 2:37pm PDT

Whether an engagement is on the cards or you're just a total magpie, there are some stunning looks here.

My ruby engagement ring! ?? Made by Nemlanka Jewellers in Sri Lanka! #ruby #rubyengagementring #rubyring #gemstone #colouredengagementring #engagementring #srilankajewellry #engagement #engaged #wifetobe

A post shared by Yvette (@le_yvette) on Jan 1, 2016 at 2:36am PST