The direct answer
18ct gold is 75% gold and is commonly marked 750. Because the metal floor is higher, sellers should be especially careful not to ignore diamonds, gemstones, maker signatures or period design. Gold prices change daily. Fair Vintage uses current market references when preparing a written offer rather than hard-coding a fixed gold price into evergreen content.
What 750 means
A 750 fineness mark indicates 750 parts per thousand gold, known as 18ct gold.
Stone-set pieces
Diamonds, sapphires, rubies, emeralds and old-cut stones need a jewellery assessment as well as a metal calculation.
Designer and antique signals
18ct gold is common in better-quality jewellery, so boxes, marks and construction details matter.
How Fair Vintage assesses this page topic
We separate the metal floor from the jewellery value. That means checking gold fineness and tested metal content, weight and construction, hallmarks, sponsor marks, assay office marks and maker signatures, age, period style and originality, gemstones, pearls, enamel and condition, designer, antique or collector demand beyond melt value, boxes, receipts, certificates and family notes. If a piece is mainly scrap, we say so; if it deserves antique, designer, gemstone or collector review, the written offer explains why.
Photographs to send
- 750 mark close-up
- stone setting from front and side
- maker or signature
- certificates or receipts
- damage to claws or shank
What jewellery owners ask on Reddit
Reddit is not used as valuation evidence. It is useful because public conversations reveal recurring seller worries: missing marks, changed fittings, whether to clean pieces, how to compare scrap and antique value, and whether a postal buyer can be trusted.
Official references used
These sources support hallmarking, gold-fineness and market-reference statements. They do not set the final Fair Vintage offer for an individual item.