18ct gold is one of the most sought-after gold alloys in the jewellery industry and is widely regarded as the perfect balance between luxury, purity, beauty, and durability. Found in high-end jewellery collections across the UK and worldwide, 18ct gold is commonly used in engagement rings, wedding bands, designer jewellery, luxury watches, necklaces, bracelets, and investment-quality pieces.
If you own jewellery stamped with a 750 hallmark, you may be wondering how much your 18ct gold is worth, what the hallmark means, how the value is calculated, and whether now is the right time to sell.
At 888 Bullion, we specialise in buying 18ct gold jewellery, scrap gold, broken jewellery, gold watches, luxury gold items, designer jewellery, and complete gold packs. Whether you have a single ring or an entire collection, understanding the value of 18ct gold can help you achieve the best possible return. Use our Gold Calculator to get an instant estimate.
18ct gold contains 75% pure gold and 25% alloy metals. Out of every 24 parts, 18 parts are pure gold and 6 parts are alloy metals — giving 18ct gold its name. Because of its high gold content, 18ct gold has a rich colour and premium appearance that many jewellery buyers prefer.
For a full explanation of gold purity, carats and fineness, see our Understanding Gold Purity guide.
The hallmark most commonly associated with 18ct gold is 750, meaning 750 parts per thousand pure gold — equivalent to 75% pure gold. You may also find: 18K, 18KT, 18CT, 18 CARAT, 750 GOLD. For a full guide to UK hallmarks, see our British Hallmark Guide. In the UK, hallmarking is overseen by the UK Assay Offices including the London Assay Office, Birmingham Assay Office, Edinburgh Assay Office, and Sheffield Assay Office.
Yes. 18ct gold contains a significantly higher proportion of gold than 8ct gold, 9ct gold, 10ct gold, and 14ct gold. Because it contains 75% pure gold, it is considered premium gold jewellery. Many luxury jewellery brands manufacture their collections using 18ct gold because of its prestige and beauty.
18ct gold occupies a unique position within the jewellery market. It offers high gold content (three-quarters pure gold), rich colour (deeper and warmer than lower-carat gold), strong resale value (higher gold content increases intrinsic value), luxury status (widely used by premium jewellery brands), and global recognition (accepted and valued worldwide). These qualities make 18ct gold one of the most desirable jewellery metals available.
Gold has symbolised wealth and status for thousands of years. Ancient civilisations including the Egyptians, Greeks, Romans, and Persians used gold for jewellery, ceremonial objects, and royal treasures. As goldsmithing evolved, jewellers developed alloys that balanced beauty with durability. 18ct gold emerged as the preferred choice for high-end jewellery because it contained substantial amounts of gold while remaining practical for daily wear. Today, many luxury jewellery houses continue to favour 18ct gold over lower-purity alternatives. Read our full History of 18ct Gold guide for more.
Understanding hallmarks can help identify jewellery quickly:
Among these, 750 gold remains one of the most desirable jewellery hallmarks in the world. You can also learn more about gold purity, carats and fineness in our dedicated guide, or read our full British Hallmark Guide for a complete breakdown of UK hallmarking.
18ct gold is available in multiple colours. Yellow Gold is the traditional and most recognised form. White Gold is created using white alloy metals and is popular in engagement jewellery. Rose Gold contains additional copper, producing a pink hue. Red Gold contains higher copper levels, creating a deeper red appearance. Regardless of colour, value is primarily determined by gold content and weight.
18ct gold is used extensively throughout the luxury jewellery market in engagement rings, wedding rings, signet rings, designer jewellery, gold necklaces, gold chains, gold bracelets, gold earrings, luxury watches, and vintage jewellery. Because of its premium status, 18ct gold is often found in high-value collections and inherited estates. See our full list of 18ct gold items we buy.
| Gold Type | Hallmark | Gold Content |
|---|---|---|
| 8ct Gold | 333 | 33.3% |
| 9ct Gold | 375 | 37.5% |
| 10ct Gold | 417 | 41.7% |
| 14ct Gold | 585 | 58.5% |
| 18ct Gold | 750 | 75% |
| 22ct Gold | 916 | 91.6% |
Because 18ct gold contains substantially more pure gold than 9ct or 10ct gold, it typically achieves a much higher value per gram. 14ct gold (585) remains highly popular, particularly in imported jewellery, but 18ct gold offers higher purity, greater intrinsic value, and richer appearance. 22ct gold (916) has higher gold content but 18ct gold is more durable, better for daily wear, and more versatile for jewellery applications.
The value of 18ct gold depends on gold purity (75% pure gold), weight (the more an item weighs, the more gold it contains), the gold spot price (changes continuously throughout the trading day in response to investor demand, economic conditions, inflation, currency markets, and global uncertainty), and refining recovery. Use our Gold Calculator to get an instant estimate based on live prices.
Read more in our guides: Is Gold a Good Hedge Against Inflation? and What Happens to Gold During a Recession?
"18ct gold price per gram" is one of the most searched terms among people looking to sell gold jewellery. The price per gram changes every day because gold markets constantly move. Factors affecting it include the gold spot price, currency exchange rates (particularly GBP/USD), inflation, global demand, and economic conditions. For the latest estimate, use the 888 Bullion Gold Calculator.
The 888 Bullion Gold Calculator helps customers estimate the value of their jewellery before requesting a valuation. It considers gold purity, weight, and current market prices to provide instant gold valuations, transparent estimates, easy comparison, gold pack estimates, and convenient home valuations.
To use it: locate the hallmark (750 for 18ct gold), weigh your jewellery using digital scales, enter the weight, and review the estimate. Whether you're valuing a single ring or an entire gold pack, the Gold Calculator provides a useful starting point.
Many people assume damaged jewellery is worthless — this is not true. Because value is based primarily on gold content, scrap 18ct gold remains highly desirable. Broken chains, bent rings, damaged bracelets, single earrings, worn jewellery, and missing stone settings all retain value. Even heavily damaged jewellery often retains substantial value. Learn how to test gold at home before selling, or read our guide on how to sell scrap gold.
Hallmarks are usually found inside the band on rings, near the clasp on necklaces, on connecting links of bracelets, on posts and backs of earrings, on attachment loops of pendants, and inside the clasp or case of watches. Hallmarks may be extremely small and require magnification. For more detail, see our British Hallmark Guide.
Hallmarks may be missing because the item is antique, wear has removed the mark, the hallmark is hidden, or imported standards differ. Professional testing can often identify gold purity even when hallmarks are absent. At 888 Bullion we use XRF metal testing for accurate results. You can also learn how to test gold at home.
Many households contain forgotten gold. Common locations include jewellery boxes, bedroom drawers, inherited collections, watch collections, estate jewellery, and scrap jewellery bags. Selling an entire gold pack often reveals considerably more value than expected. Read our guide on how to value inherited jewellery for more.
We purchase a wide range of 18ct gold items including wedding rings, engagement rings, signet rings, dress rings, vintage rings, chains (curb, rope, belcher, box, figaro, snake), necklaces (designer, vintage, imported, luxury, scrap), bracelets (bangles, charm, tennis, designer, gold cuffs), earrings (stud, hoop, drop, designer — even singles), pendants (cross, lockets, religious, designer, vintage), luxury watches (gold cases, bracelets, vintage, pocket, designer), designer jewellery, vintage jewellery, estate jewellery, scrap gold, and complete gold packs. See our full list of 18ct gold items we buy.
At 888 Bullion, we focus on providing a transparent and professional service from our Hatton Garden base in London. Customers choose us because of our professional valuations, competitive pricing linked to live market conditions, industry experience, transparent process, and friendly customer service. Whether you are selling one item or an entire gold pack, our team is here to help. Visit our Sell Gold & Silver page to get started, or read our guide on how to sell gold jewellery.
Selling unwanted jewellery helps support precious metal recycling. Benefits include reduced mining demand, lower environmental impact, resource conservation, and sustainable gold supply. Every recycled gold item contributes to a more sustainable industry.
Step 1 – Gather your jewellery (check jewellery boxes, drawers, safes, watch collections). Step 2 – Check hallmarks (look for 750, 18K, 18CT, 18KT) — see our British Hallmark Guide. Step 3 – Use the Gold Calculator to estimate value. Step 4 – Contact 888 Bullion and request a valuation. Step 5 – Our team provides a professional assessment using XRF metal testing. Step 6 – Receive your valuation based on current market conditions.
18ct gold contains 75% pure gold. See our Understanding Gold Purity guide for more.
Yes.
750 means 75% pure gold. See our British Hallmark Guide for more.
Yes. 750 gold is one of the most desirable jewellery hallmarks worldwide. Use our Gold Calculator for an estimate.
The 18ct gold price per gram changes daily according to market conditions. Check our Gold Calculator for the latest estimate.
Absolutely. Read our guide on how to sell scrap gold.
Yes.
Yes to all. See our gold watch and 18ct gold items pages.
Yes. See our vintage jewellery and estate jewellery pages.
Yes. See our designer jewellery page.
Yes. Read our guide on selling inherited jewellery.
A tool used to estimate the value of gold jewellery. Try our Gold Calculator here.
Yes. Visit our Gold Pack page to find out more.
Professional testing may still identify genuine gold. We use XRF metal testing for accurate results.
18ct gold contains twice as much gold. Read our 9ct Gold Guide for a full comparison.
18ct gold contains more pure gold. See our 14ct gold page for details.
Both have advantages. 22ct gold has higher gold content; 18ct gold is more durable and versatile.
Value depends primarily on purity and weight. Read our What Is White Gold? guide.
Yes to all. Read our What Is Rose Gold? guide for more.
Many people choose to sell when gold prices are strong. Read our guide: Best Time to Sell Gold in the UK.
Gold prices respond to market conditions and investor demand. Read more: Is Gold a Good Hedge Against Inflation?
Visit our Hatton Garden gold buyers page or our Sell Gold London page for more information.
Ready to discover the value of your 18ct gold? Whether you own 750 gold jewellery, luxury gold watches, designer jewellery, vintage jewellery, scrap gold, estate jewellery, broken gold chains, gold rings, or a complete gold pack, our team can help. Use our Gold Calculator or visit our Sell Gold & Silver page to get started.
From understanding 750 gold hallmarks and 18ct gold purity to checking the latest 18ct gold price per gram, using a Gold Calculator, valuing a gold pack, and calculating scrap 18ct gold value, this guide has provided everything you need to know about 18ct gold.
Whether you own a single ring, luxury jewellery, inherited gold, designer pieces, gold watches, vintage collections, scrap jewellery, or an entire estate collection, your gold could be worth more than you think.
Use the 888 Bullion Gold Calculator today, check your 750 hallmarks, and find out how much your 18ct gold could be worth.
