An antique engagement ring has already lived a life. Its history and present condition both deserve attention. Judge the diamond, setting, repairs and paperwork together.
1. Budget for the whole ring
Include inspection, sizing, prong work, insurance and any repair needed before regular wear. A new shank and six replacement prongs can change the budget considerably.
2. Identify every stone
Confirm the material and replacement history of each stone. Early synthetics exist, and stones are often replaced during repair. Ask what was tested, by whom and with what result.
3. Match the report to the diamond
A laboratory report describes the loose diamond at the time of examination. The mounting needs its own condition examination. Match the number, measurements and plotted features, then inspect the complete ring.
4. Inspect the setting under magnification
Look for worn prongs, thin shank sections, solder seams, missing milgrain, damaged enamel and stone movement. Antique diamonds may have thin girdles, so the setter should map the stone before tightening anything.
5. Separate period from style
Period-inspired rings are also made today. Hallmarks, construction, metal, cutting style and documented ownership can support a date.
6. Ask what changed
Resizing, replacement shanks, converted brooches and later centre stones are common. Ask for the alterations and their effect on condition to be documented.
7. Confirm it can be sized
Eternity bands, engraved shanks and delicate mountings may allow little adjustment. Ask whether sizing would disturb engraving, hallmarks, alignment or structural support.
8. Change the light
View the diamond in diffused daylight, indoor light and motion. Broad flashes and an open culet may belong to the cut. A fixed dark area or damaged girdle needs a closer look.
9. Put the terms in writing
The invoice should identify the item, stones, known repairs, reports, price, taxes, return terms and delivery responsibility. If provenance affects the description, ask for the supporting documents.
10. Use an independent inspection when it matters
A qualified independent appraiser or gemologist can verify materials and document condition before the return period closes. Ask for a written description of the findings and any work needed.
GIA's guide to shopping for antique and vintage engagement rings covers identity, worn prongs, sizing and appraisal. For a loose antique diamond, use our condition guide.