Diamond and jewellery buyer guides

Understand the stone, report, complete quotation and custom-design process so your choice has a clear basis.

Yinuo buyer guide · Updated 10 October 2026

Compare the same diamond and complete ring: origin, grades, report, metal, setting, complete total and written terms.

Understand diamond origin and compare your priorities, appearance, reports and complete-ring budget before choosing natural or lab-grown.

Verify the report number, origin, stone details and report format, and match the document to the individual diamond you are considering.

Bring an idea, inspiration, budget and date. Learn what to discuss and confirm before commissioning jewellery made locally in Singapore.

The 4Cs,
a useful beginning.

Each diamond deserves an individual comparison. Grading information helps you ask questions; consider it alongside the stone and finished ring.

Carat is weight. Look at the measurements and proportions as well.

For round brilliants, compare cut, polish and symmetry; 3EX means Excellent in all three.

Understand the selected stone’s colour grade and view its appearance.

Review the characteristics recorded on the report alongside the actual stone.