“Rolex 18K golden tie” is not a precise trade term. It could mean a gold Rolex bracelet, a strap-related part, a clasp, a spare link, or even another 18K object described badly in translation. Do not value it until you identify what the item actually is and weigh the actual 18K metal part.
Method for the metal-content estimate
The London Assay Office hallmark guide lists gold 750 as a recognised fineness. In ordinary jewellery language, 18K/750 means about 75% gold by weight. The basic calculation is: actual 18K metal weight × 0.75 × a pure-gold price per gram, before any buyer deductions. If the buyer instead quotes a price per gram of 18K material, multiply that quote by the 18K weight directly: do not apply 0.75 a second time. Compare quotes in the same currency and on the same date.
For illustration only, if an 18K part weighed 10g, that hypothetical part would contain about 7.5g of pure-gold equivalent. At an entirely hypothetical pure-gold reference price of RMB 800/g, that would be 10 × 0.75 × 800 = RMB 6,000 before deductions. A hypothetical direct 18K buyback quote of RMB 580/g would instead give RMB 5,800 before separately charged fees. Neither figure is a current price, and this 10g number is not the item’s actual weight. The real number must come from weighing the specific bracelet, link, clasp or other part after excluding non-gold parts where relevant.
Why a Rolex part may not equal a simple gold sale
The World Gold Council gold investment guide describes premiums over spot and delivery, storage and insurance costs for investment bars and coins. It is not a Rolex-parts valuation guide, but it illustrates why a quoted reference price and the amount received in a specific transaction differ. A metal buyer may pay less than the simple formula after deductions. A watch specialist may pay more than metal value only if the part is genuine, model-correct, complete, saleable and in acceptable condition.
Before selling or exchanging, get the part identified, photograph hallmarks and clasp/link codes, weigh it, and ask for the calculation in writing. If a shop offers an exchange, confirm the old-item weight, new-item weight, workmanship fee, trade-in deduction and final cash difference. The Xinhua gold jewellery exchange warning is a reminder that unclear weight and fee terms can change the result dramatically.
Do not melt or destructively test an apparently collectable part before obtaining the specialist quote: that can remove the features being valued. A 750 mark alone does not authenticate the Rolex brand, and a whole watch’s weight is not the weight of its gold. Photograph and record the part before agreeing to any test or removal of components.