Top 50 Diamonds by Certification Score in Singapore
Ranked by certificate rigour. GIA and AGS stones with complete grading, clear symmetry, and verified provenance come out on top. Pricing shown in SGD.
Last updated 1 November 2026 · Based on 50 active listings ranked by certification
What Certification Score Rewards
Certification score measures the rigour and completeness of the grading report behind each diamond. It weights the grading lab (GIA and AGS lead; IGI and HRD follow; newer or less-consistent labs are lower), the presence of a polish and symmetry grade (required for Excellent-cut claims), and the completeness of the proportions data. It's not measuring the diamond itself. It's measuring how confident you can be that the grades on paper match what you'll receive.
Use this list when you're buying at a price point where certification rigour matters most. Say, above $10,000, or when the stone will be insured, resold, or given as a gift with a certificate presentation. The top of this list is where the paper trail is strongest: full GIA reports with polish and symmetry grades, complete measurement data, and a clean provenance.
A high certification score doesn't mean the stone is beautiful. It just means the grading is trustworthy. Cross-reference with quality score for stones that are both well-documented and well-made. For lab-grown, IGI tops this list more often than GIA because IGI has become the default lab-grown certifier and has the most complete reports for that segment.
| # | Diamond | Origin | Grade | Lowest Price (SGD) |
|---|---|---|---|---|
| 1 | 17.84ct CUSHION E VS2 | lab grown | A+ | $46,165 SGD |
| 2 | 16.72ct OVAL F VS2 | lab grown | A+ | $35,718 SGD |
| 3 | 16.48ct OVAL F SI1 | lab grown | A+ | $4,914 SGD |
| 4 | 16.45ct OVAL F SI1 | lab grown | A+ | $7,609 SGD |
| 5 | 16.21ct RADIANT F VS2 | lab grown | A+ | $34,086 SGD |
| 6 | 16.09ct EMERALD F VS2 | lab grown | A+ | $15,100 SGD |
| 7 | 16.08ct OVAL G VS2 | lab grown | A+ | $7,447 SGD |
| 8 | 15.76ct OVAL E VS2 | lab grown | A+ | $33,668 SGD |
| 9 | 15.71ct ROUND F VS2 | lab grown | A+ | $25,978 SGD |
| 10 | 15.67ct OVAL F VS2 | lab grown | A+ | $33,476 SGD |
| 11 | 15.61ct RADIANT G VVS2 | lab grown | A+ | $33,970 SGD |
| 12 | 15.45ct RADIANT G VS2 | lab grown | A+ | $27,654 SGD |
| 13 | 15.27ct EMERALD H VS2 | lab grown | A+ | $6,965 SGD |
| 14 | 15.20ct ROUND E SI1 | lab grown | A+ | $12,725 SGD |
| 15 | 15.20ct ROUND E SI1 | lab grown | A+ | $18,109 SGD |
| 16 | 15.16ct EMERALD F VS2 | lab grown | A+ | $12,692 SGD |
| 17 | 15.01ct ROUND E VS2 | lab grown | A+ | $24,823 SGD |
| 18 | 15.00ct OVAL E VS1 | lab grown | A+ | $29,803 SGD |
| 19 | 14.85ct EMERALD F VS1 | lab grown | A+ | $17,021 SGD |
| 20 | 14.60ct CUSHION F VS1 | lab grown | A+ | $20,036 SGD |
| 21 | 14.29ct PEAR F VS2 | lab grown | A+ | $12,068 SGD |
| 22 | 14.23ct ROUND F VS2 | lab grown | A+ | $12,186 SGD |
| 23 | 14.04ct RADIANT F VS1 | lab grown | A+ | $18,229 SGD |
| 24 | 13.85ct ROUND F VS1 | lab grown | A+ | $12,588 SGD |
| 25 | 13.73ct ROUND F VS2 | lab grown | A+ | $11,742 SGD |
| 26 | 13.65ct ROUND F VS2 | lab grown | A+ | $11,699 SGD |
| 27 | 13.52ct ROUND E VS1 | lab grown | A+ | $25,598 SGD |
| 28 | 13.34ct EMERALD I VS2 | lab grown | A+ | $6,210 SGD |
| 29 | 13.22ct RADIANT E VS1 | lab grown | A+ | $33,942 SGD |
| 30 | 13.19ct OVAL E VVS2 | lab grown | A+ | $19,089 SGD |
| 31 | 13.11ct RADIANT E VS1 | lab grown | A+ | $23,048 SGD |
| 32 | 13.07ct ROUND E VS2 | lab grown | A+ | $11,297 SGD |
| 33 | 13.06ct ROUND F VS2 | lab grown | A+ | $11,204 SGD |
| 34 | 13.06ct ROUND G VS2 | lab grown | A+ | $12,935 SGD |
| 35 | 12.84ct OVAL E VS2 | lab grown | A+ | $12,158 SGD |
| 36 | 12.75ct ROUND F VS2 | lab grown | A+ | $10,943 SGD |
| 37 | 12.69ct RADIANT E VS2 | lab grown | A+ | $28,305 SGD |
| 38 | 12.64ct ROUND E VS2 | lab grown | A+ | $10,934 SGD |
| 39 | 12.63ct ROUND F VS2 | lab grown | A+ | $10,842 SGD |
| 40 | 12.62ct ROUND E VVS2 | lab grown | A+ | $14,332 SGD |
| 41 | 12.59ct OVAL E VS2 | lab grown | A+ | $19,288 SGD |
| 42 | 12.55ct ROUND F VS2 | lab grown | A+ | $10,776 SGD |
| 43 | 12.55ct OVAL E VS2 | lab grown | A+ | $19,227 SGD |
| 44 | 12.53ct ROUND E VS2 | lab grown | A+ | $20,810 SGD |
| 45 | 12.43ct ROUND F VS2 | lab grown | A+ | $8,981 SGD |
| 46 | 12.38ct ROUND E VS1 | lab grown | A+ | $23,474 SGD |
| 47 | 12.36ct RADIANT E VS2 | lab grown | A+ | $10,799 SGD |
| 48 | 12.34ct ROUND E VS2 | lab grown | A+ | $10,681 SGD |
| 49 | 12.34ct RADIANT F VS1 | lab grown | A+ | $12,404 SGD |
| 50 | 12.31ct ROUND F VS1 | lab grown | A+ | $21,223 SGD |
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