Gold, Grade Information
18ct Gold
18 carat gold is 75% pure gold, the prestige standard for fine British and European jewellery, watches, and luxury items. Substantially more valuable than 9ct per gram.
Periodic Table Position
History & Interesting Facts
Eighteen-carat gold has been the preferred purity for fine European jewellery for centuries. It strikes the ideal balance between high gold content (75%) and the practical durability added by the 25% alloy metals (typically copper, silver, and sometimes palladium). The major jewellery traditions of France, Italy, and Switzerland, the global luxury leaders, historically worked predominantly in 18ct. Swiss watchmakers have used 18ct gold for prestigious watch cases since the 18th century, establishing the "750" hallmark (750 parts per thousand gold, equivalent to 18ct) as the standard for luxury timepieces. British fine jewellers, including Cartier London, Garrard, and Asprey, have produced 18ct jewellery for the aristocracy and upper classes since the Georgian era. The engagement ring and wedding bands of the British royal family are traditionally made from a single nugget of Welsh 18ct gold, continuing a tradition started with Queen Elizabeth the Queen Mother's 1923 wedding ring.
Historical Uses
Eighteen-carat gold occupies the luxury jewellery tier. Important rings, engagement rings, signet rings of family crests, are traditionally made in 18ct or higher. Fine watches: virtually every prestigious Swiss watch brand (Rolex, Patek Philippe, Cartier) offers models in 18ct yellow, white, or rose gold. Heirloom jewellery, pieces intended to last generations, is made in 18ct for its superior corrosion resistance and colour richness compared to 9ct. Dental gold historically used 18ct and higher alloys for high-stress dental restorations such as crowns and inlays, where gold's biocompatibility and dimensional stability are particularly valuable. Museum-quality jewellery from the Georgian, Victorian, and Edwardian eras that still circulates through auctions and estate sales is predominantly 18ct. Ceremonial regalia, including civic chains of office, academic medals, and military decorations, often uses 18ct gold.
Current Uses
Eighteen-carat gold scrap comes primarily from damaged or broken fine jewellery, watch case movements from old or damaged luxury watches, dental gold recovered during dental treatment, and estate sales of high-quality jewellery. The scrap value of 18ct items is substantially higher than 9ct due to the 75% gold content. Modern fine jewellery manufacturers use 18ct gold for engagement rings, brooches, and statement pieces. Investment coins (though most are 22ct or 24ct) occasionally include 18ct alloy pieces. White gold, 18ct gold alloyed with palladium or nickel to produce a silver-coloured precious metal, is extremely popular for engagement rings and has largely replaced platinum in many retail jewellery applications due to its lower cost. Rose gold (18ct gold alloyed with copper for a pink-gold hue) has become fashionable in recent years for both jewellery and luxury accessories.
Future Possible Uses
The demand for 18ct gold in luxury goods remains robust, driven by the continued growth of the global high-net-worth and ultra-high-net-worth population, particularly in Asia and the Middle East. Chinese and Indian demand for fine gold jewellery, both cultural and investment-driven, is a structural long-term growth driver. Lab-grown diamond adoption is actually increasing the value attributed to the gold setting in fine jewellery, as buyers redirect spending toward the gold itself. Wearable technology in gold, smart watches with gold cases, including Apple Watch and high-end hybrid smart watches, is creating new demand in a technology-luxury crossover segment. In medicine, gold nanoparticles for cancer treatment (gold nanoparticle photothermal therapy is an active research area) may eventually create industrial-scale medical gold demand. Gold's role in electronics and space technology ensures baseline industrial demand regardless of jewellery fashion trends.
Where Does This Scrap Come From?
18ct gold scrap comes from estate clearances (inheritance of high-quality jewellery), divorce settlements where jewellery is liquidated, damaged luxury watches being broken for parts, dental gold recovered during tooth restoration replacements, pawnbroker overstock and unredeemed pledges, and private sales where individuals liquidate fine jewellery for cash. Antique dealers and auction houses occasionally direct unsaleable items to scrap refiners. The higher value per gram of 18ct items means QuickStop Metals and specialist precious metal buyers apply rigorous assay protocols, the difference between 9ct and 18ct content represents a factor of two in value, making accurate identification critical for fair pricing. XRF analysis confirms hallmarks and detects misrepresented items. UK hallmarks for 18ct are "750" (post-1999) or an 18ct crown punch (pre-1999).
How Is It Remanufactured?
Eighteen-carat gold scrap is refined through the same processes as 9ct but starts at a higher gold concentration, making the process more efficient. Mixed 18ct scrap is smelted to produce a homogeneous gold-copper-silver alloy at 75% gold. The Miller chlorination or Wohlwill electrolytic process is then used to refine to 99.99% purity ("four nines" fine gold). At 75% starting gold content, the refining loss is smaller and the base metal by-products (silver and copper) are proportionally less significant than for 9ct material. Recovered gold is cast into London Good Delivery bars (400 troy ounce, 99.5% minimum) and sold at the LBMA price. Some of this gold re-enters jewellery manufacture as 18ct alloy (gold mixed with base metals to the target specification). The UK's precious metal refining industry is centred on firms including Heimerle + Meule, PX Precinox, and specialist assay offices.
5-Year Price Trend & Forecast
Gold scrap prices for 18ct items track the LBMA gold spot price at 75% of the pure gold value, less refining charges. Over 2021–2026, the LBMA gold price rose from approximately £1,350/oz to record highs above £2,800/oz in 2025–2026, driven by central bank buying, geopolitical tensions, and investor safe-haven demand. At £2,600/oz gold, 18ct scrap is worth approximately £1,950/oz pure gold equivalent, or around £62–65 per gram at scrap (after refining charges). This represents a very significant increase from 2021, when the equivalent figure was approximately £32–35 per gram. Professional scrap buyers like QuickStop offer prices linked to the daily LBMA fixing, updated each morning. The long-term outlook for gold prices remains positive given structural central bank demand and investor confidence in gold as a hedge.
Note: All scrap yard prices paid by QuickStop Metals are calculated as a percentage of the prevailing LME or spot market price, updated daily. Check today's prices →
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