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 31 July 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 | Score | Lowest Price (SGD) |
|---|---|---|---|---|
| 1 | 8.04ct ROUND K SI1 | natural | 100 | $105,380 SGD |
| 2 | 8.03ct OVAL G VS2 | natural | 100 | $472,615 SGD |
| 3 | 7.03ct CUSHION F VS2 | natural | 100 | $436,467 SGD |
| 4 | 7.01ct PEAR I SI2 | natural | 100 | $125,533 SGD |
| 5 | 6.06ct OVAL D VVS2 | lab grown | 100 | $19,753 SGD |
| 6 | 5.30ct HEART D FL | natural | 100 | $290,360 SGD |
| 7 | 5.12ct OVAL E VVS2 | lab grown | 100 | $13,824 SGD |
| 8 | 5.11ct HEART D IF | lab grown | 100 | $18,215 SGD |
| 9 | 5.06ct OVAL E IF | lab grown | 100 | $18,036 SGD |
| 10 | 5.04ct HEART E IF | lab grown | 100 | $15,143 SGD |
| 11 | 5.01ct ROUND H SI2 | natural | 100 | $67,411 SGD |
| 12 | 4.71ct HEART D IF | lab grown | 100 | $12,217 SGD |
| 13 | 4.58ct ASSCHER E VVS2 | lab grown | 100 | $11,233 SGD |
| 14 | 4.56ct OVAL D VVS1 | lab grown | 100 | $15,653 SGD |
| 15 | 4.24ct ROUND D VVS1 | lab grown | 100 | $6,269 SGD |
| 16 | 4.22ct ROUND D VVS1 | lab grown | 100 | $6,240 SGD |
| 17 | 4.21ct OVAL D VVS1 | lab grown | 100 | $8,948 SGD |
| 18 | 4.16ct HEART D IF | lab grown | 100 | $11,197 SGD |
| 19 | 4.09ct OVAL F VVS2 | lab grown | 100 | $7,520 SGD |
| 20 | 4.07ct OVAL D VS1 | lab grown | 100 | $11,855 SGD |
| 21 | 4.03ct PRINCESS I VS2 | natural | 100 | $72,712 SGD |
| 22 | 4.01ct ROUND J SI1 | natural | 100 | $45,080 SGD |
| 23 | 4.01ct ROUND F IF | natural | 100 | $202,751 SGD |
| 24 | 3.96ct OVAL D FL | lab grown | 100 | $19,343 SGD |
| 25 | 3.91ct OVAL E VS1 | lab grown | 100 | $2,355 SGD |
| 26 | 3.79ct ASSCHER D FL | lab grown | 100 | $19,009 SGD |
| 27 | 3.67ct PRINCESS D VVS1 | lab grown | 100 | $5,549 SGD |
| 28 | 3.62ct ASSCHER G VVS2 | lab grown | 100 | $920 SGD |
| 29 | 3.60ct OVAL E VVS1 | lab grown | 100 | $10,507 SGD |
| 30 | 3.57ct HEART D IF | lab grown | 100 | $7,221 SGD |
| 31 | 3.55ct ASSCHER F VS1 | lab grown | 100 | $7,473 SGD |
| 32 | 3.52ct OVAL E VS2 | lab grown | 100 | $2,415 SGD |
| 33 | 3.52ct OVAL J SI1 | natural | 100 | $41,044 SGD |
| 34 | 3.51ct CUSHION E VS2 | lab grown | 100 | $2,360 SGD |
| 35 | 3.42ct ROUND E VVS1 | lab grown | 100 | $3,895 SGD |
| 36 | 3.37ct PRINCESS E VS2 | lab grown | 100 | $6,760 SGD |
| 37 | 3.37ct OVAL E VVS2 | lab grown | 100 | $8,533 SGD |
| 38 | 3.33ct RADIANT L VS1 | natural | 100 | $37,006 SGD |
| 39 | 3.28ct ROUND F VS1 | lab grown | 100 | $1,749 SGD |
| 40 | 3.28ct PRINCESS E VVS2 | lab grown | 100 | $8,273 SGD |
| 41 | 3.26ct OVAL E IF | lab grown | 100 | $6,028 SGD |
| 42 | 3.17ct ROUND D VVS1 | lab grown | 100 | $2,803 SGD |
| 43 | 3.09ct CUSHION D VVS2 | lab grown | 100 | $4,880 SGD |
| 44 | 3.07ct OVAL E VS2 | lab grown | 100 | $1,653 SGD |
| 45 | 3.06ct ROUND E VS1 | lab grown | 100 | $19,301 SGD |
| 46 | 3.06ct ROUND D VS2 | lab grown | 100 | $25,857 SGD |
| 47 | 3.05ct OVAL E VS2 | lab grown | 100 | $1,139 SGD |
| 48 | 3.05ct OVAL K SI1 | natural | 100 | $28,761 SGD |
| 49 | 3.04ct ROUND D VVS1 | lab grown | 100 | $3,615 SGD |
| 50 | 3.04ct HEART I SI2 | natural | 100 | $16,400 SGD |
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