{"title":"Lab-Grown Marquise Diamond Engagement Rings","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eExplore our collection of lab-grown marquise diamond engagement rings from Not Mined, handcrafted in 18ct hallmarked gold and made to order in the UK. The marquise cut — also known as the navette — is one of the most dramatic and distinctive diamond shapes, with a pointed, elongated form originally commissioned by King Louis XV to mirror the smile of the Marquise de Pompadour. Every ring in this collection features an Ideal cut, D colour, VVS+ clarity lab-grown diamond, individually handpicked by our founder and accompanied by an IGI or GIA certificate.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe marquise diamond's narrow, tapered silhouette creates the most surface area of any diamond shape relative to its carat weight, meaning your stone faces up larger than the same weight in a round or cushion cut. It is one of the most flattering shapes on the hand, elongating the finger with an elegance that feels both bold and feminine.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe marquise cut commands attention in a solitaire setting where its dramatic outline does all the work, looks stunning in a halo design that amplifies its already generous spread, and brings a striking sense of direction to east-west and bezel settings. It is a shape that rewards those who want something distinctive without straying from timeless design.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eYour experience with Not Mined is as considered as the ring itself. Our founder personally handpicks a selection of diamonds for you to choose from, so every stone is judged on its real-world sparkle and quality — not just a certificate. If you want to go further, you can bespoke design your ring from scratch through a relaxed, non-pushy consultation where we guide you to the right choice without the pressure. From purchase to delivery we keep you updated at every stage — confirmation your diamond has been secured, CAD designs shared during crafting if needed, hallmarking updates, and dispatch notification. We target three to four weeks from order to your door.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eChoosing a marquise engagement ring from Not Mined means choosing a ring that makes the most of every carat, backed by the highest standards. 18ct hallmarked gold, top-grade certified diamonds, fully traceable origins, and pricing that lets you invest in standout design rather than an inflated industry markup.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eFind your perfect marquise diamond engagement ring below, or book a free consultation if you would like personal guidance from our team.\u003c\/p\u003e","products":[{"product_id":"classic-marquise-cut-solitaire","title":"Classic Marquise Cut Solitaire","description":"\u003cp\u003e\u003cstrong\u003eClassic Marquise Cut Solitaire\u003c\/strong\u003e — The most finger-flattering diamond shape — a hand-picked, certified lab grown marquise diamond with an elongated, eye-shaped silhouette in our signature Not Mined setting.\u003c\/p\u003e\u003cp\u003eThe marquise cut has the largest face-up area of any diamond shape per carat, making it appear significantly larger than other cuts of the same weight. The pointed ends create a dramatic, elongating effect on the finger while the brilliant-cut facets deliver excellent sparkle.\u003c\/p\u003e\u003cp\u003eEvery centre diamond is hand-picked to our exacting standard: Ideal cut, D colour and VVS clarity or higher — selected not just for certification, but for maximum sparkle and fire with the optimum dimensions. For marquise cuts, we pay particular attention to symmetry between the two points and the quality of the bow-tie effect. Each stone is assessed for the most flattering proportions and liveliest light performance.\u003c\/p\u003e\u003cp\u003eQuality and collaboration are at the heart of everything we do. We only use 18k gold for its superior durability and richness of colour — available in yellow gold, white gold or rose gold. Platinum is available on request through our bespoke service. We are happy to hand-pick the perfect diamond for you, or if you prefer more involvement, let us know in advance and we will share a curated selection for you to choose from. For those who want complete control, our bespoke service lets you create your engagement ring from start to finish.\u003c\/p\u003e\u003cp\u003eIdeal for maximum visual impact per carat — hand-picked to our standard, or design something entirely your own through our bespoke service.\u003c\/p\u003e\u003cp\u003eAvailable with lab grown diamond options from 1.0ct to 3.0ct. Normally ready within 3–4 weeks with free insured UK shipping and 30-day returns on every order.\u003c\/p\u003e","brand":"Not Mined","offers":[{"title":"18k Yellow Gold \/ 1.0ct","offer_id":54008326029653,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-10CT-YG","price":1795.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 1.0ct","offer_id":54008326062421,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-10CT-WG","price":1795.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 1.0ct","offer_id":54008326095189,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-10CT-RG","price":1795.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 1.5ct","offer_id":54008326127957,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-15CT-YG","price":2250.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 1.5ct","offer_id":54008326160725,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-15CT-WG","price":2250.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 1.5ct","offer_id":54008326193493,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-15CT-RG","price":2250.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 2.0ct","offer_id":54008326226261,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-20CT-YG","price":2995.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 2.0ct","offer_id":54008326259029,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-20CT-WG","price":2995.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 2.0ct","offer_id":54008326291797,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-20CT-RG","price":2995.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 2.5ct","offer_id":54008326324565,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-25CT-YG","price":3750.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 2.5ct","offer_id":54008326357333,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-25CT-WG","price":3750.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 2.5ct","offer_id":54008326390101,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-25CT-RG","price":3750.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 3.0ct","offer_id":54008326422869,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-30CT-YG","price":4495.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 3.0ct","offer_id":54008326455637,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-30CT-WG","price":4495.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 3.0ct","offer_id":54008326488405,"sku":"NM-ER-B1-32-CLASSICMARQUISECUT-30CT-RG","price":4495.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/3756\/7061\/files\/ChatGPT_Image_Feb_11_2026_06_10_38_PM.png?v=1779791213"},{"product_id":"marquise-hidden-halo","title":"Marquise Hidden Halo","description":"\u003cp\u003e\u003cstrong\u003eMarquise Hidden Halo\u003c\/strong\u003e — A marquise diamond with a hidden halo of micro-set stones beneath — featuring a hand-picked, certified lab grown centre stone of outstanding brilliance.\u003c\/p\u003e\u003cp\u003eThe hidden halo follows the distinctive marquise outline beneath the centre stone, adding sparkle from side angles while preserving the clean, pointed silhouette from above. The marquise shape already appears larger than its carat weight, and the hidden halo amplifies this effect further.\u003c\/p\u003e\u003cp\u003eEvery centre diamond is hand-picked to our exacting standard: Ideal cut, D colour and VVS clarity or higher — selected not just for certification, but for maximum sparkle and fire with the optimum dimensions. Each marquise is selected for its symmetry, proportions and light performance, with the hidden halo designed to enhance the stone's natural drama.\u003c\/p\u003e\u003cp\u003eQuality and collaboration are at the heart of everything we do. We only use 18k gold for its superior durability and richness of colour — available in yellow gold, white gold or rose gold. Platinum is available on request through our bespoke service. We are happy to hand-pick the perfect diamond for you, or if you prefer more involvement, let us know in advance and we will share a curated selection for you to choose from. For those who want complete control, our bespoke service lets you create your engagement ring from start to finish.\u003c\/p\u003e\u003cp\u003eFor the marquise shape with a modern hidden twist — hand-picked to our standard, or let us share a curated selection for you to choose from.\u003c\/p\u003e\u003cp\u003eAvailable with lab grown diamond options from 1.0ct to 3.0ct. The total diamond weight will vary by your chosen carat size, with additional brilliance from the surrounding stones. Normally ready within 3–4 weeks with free insured UK shipping and 30-day returns on every order.\u003c\/p\u003e","brand":"Not Mined","offers":[{"title":"18k Yellow Gold \/ 1.0ct","offer_id":54008326685013,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-10CT-YG","price":1995.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 1.0ct","offer_id":54008326717781,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-10CT-WG","price":1995.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 1.0ct","offer_id":54008326750549,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-10CT-RG","price":1995.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 1.5ct","offer_id":54008326783317,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-15CT-YG","price":2350.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 1.5ct","offer_id":54008326816085,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-15CT-WG","price":2350.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 1.5ct","offer_id":54008326848853,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-15CT-RG","price":2350.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 2.0ct","offer_id":54008326881621,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-20CT-YG","price":3250.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 2.0ct","offer_id":54008326914389,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-20CT-WG","price":3250.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 2.0ct","offer_id":54008326947157,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-20CT-RG","price":3250.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 2.5ct","offer_id":54008326979925,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-25CT-YG","price":3850.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 2.5ct","offer_id":54008327012693,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-25CT-WG","price":3850.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 2.5ct","offer_id":54008327045461,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-25CT-RG","price":3850.0,"currency_code":"GBP","in_stock":true},{"title":"18k Yellow Gold \/ 3.0ct","offer_id":54008327078229,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-30CT-YG","price":4750.0,"currency_code":"GBP","in_stock":true},{"title":"18k White Gold \/ 3.0ct","offer_id":54008327110997,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-30CT-WG","price":4750.0,"currency_code":"GBP","in_stock":true},{"title":"18k Rose Gold \/ 3.0ct","offer_id":54008327143765,"sku":"NM-ER-B1-33-MARQUISEHIDDENHALO-30CT-RG","price":4750.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/3756\/7061\/files\/Marquise_Hidden_Halo_6216ef56-9571-4d02-b680-72d71bcc8289.png?v=1779787998"}],"url":"https:\/\/www.notmined.co.uk\/collections\/marquise-engagement-rings.oembed","provider":"Not Mined","version":"1.0","type":"link"}