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 15 September 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 | 1.64ct ROUND FANCY I2 | natural | 99 | $5,558 SGD |
| 2 | 0.45ct ROUND FANCY I1 | natural | 99 | $1,096 SGD |
| 3 | 5.59ct ROUND FANCY SI2 | natural | 98 | $61,977 SGD |
| 4 | 5.50ct ROUND FANCY SI2 | natural | 98 | $71,104 SGD |
| 5 | 4.00ct ROUND FANCY I2 | natural | 98 | $28,600 SGD |
| 6 | 3.53ct PEAR FANCY SI2 | natural | 98 | $14,989 SGD |
| 7 | 2.15ct ROUND FANCY VVS1 | natural | 98 | $96,745 SGD |
| 8 | 1.51ct RADIANT FANCY VVS1 | natural | 98 | $14,749 SGD |
| 9 | 1.50ct PEAR FANCY VVS2 | natural | 98 | $16,113 SGD |
| 10 | 1.32ct ROUND FANCY SI1 | natural | 98 | $7,258 SGD |
| 11 | 1.31ct RADIANT FANCY IF | natural | 98 | $9,924 SGD |
| 12 | 1.11ct OVAL FANCY VVS1 | natural | 98 | $14,625 SGD |
| 13 | 1.10ct RADIANT FANCY VVS1 | natural | 98 | $6,285 SGD |
| 14 | 1.02ct ROUND FANCY SI2 | natural | 98 | $1,825 SGD |
| 15 | 1.01ct PEAR FANCY VVS2 | natural | 98 | $8,589 SGD |
| 16 | 1.00ct HEART FANCY VS2 | natural | 98 | $3,094 SGD |
| 17 | 0.70ct OVAL FANCY VS1 | natural | 98 | $942 SGD |
| 18 | 0.50ct ROUND N SI2 | natural | 98 | $973 SGD |
| 19 | 0.40ct OVAL FANCY I1 | natural | 98 | $1,636 SGD |
| 20 | 0.36ct ROUND FANCY SI2 | natural | 98 | $1,465 SGD |
| 21 | 0.34ct ROUND FANCY VVS2 | natural | 98 | $1,405 SGD |
| 22 | 0.31ct ROUND FANCY SI2 | natural | 98 | $3,537 SGD |
| 23 | 0.30ct ROUND FANCY VS2 | natural | 98 | $730 SGD |
| 24 | 0.27ct ROUND FANCY I1 | natural | 98 | $2,445 SGD |
| 25 | 1.33ct ROUND FANCY VS2 | natural | 97 | $8,139 SGD |
| 26 | 10.96ct PEAR FAINT PINK IF | natural | 96 | $1,538,499 SGD |
| 27 | 5.53ct RADIANT FANCY VS2 | natural | 96 | $102,804 SGD |
| 28 | 3.49ct ROUND D FL | lab grown | 96 | $17,504 SGD |
| 29 | 3.08ct ROUND K VVS1 | natural | 96 | $27,240 SGD |
| 30 | 2.50ct ROUND L VS1 | natural | 96 | $15,492 SGD |
| 31 | 2.23ct ROUND K IF | natural | 96 | $22,267 SGD |
| 32 | 2.09ct PEAR FANCY VS1 | natural | 96 | $9,063 SGD |
| 33 | 2.07ct CUSHION FANCY SI1 | natural | 96 | $33,328 SGD |
| 34 | 1.80ct OVAL L SI2 | natural | 96 | $6,823 SGD |
| 35 | 1.72ct OVAL K SI2 | natural | 96 | $7,415 SGD |
| 36 | 1.53ct ROUND L SI1 | natural | 96 | $3,691 SGD |
| 37 | 1.51ct ROUND L VS1 | natural | 96 | $3,345 SGD |
| 38 | 1.51ct ROUND L SI1 | natural | 96 | $6,497 SGD |
| 39 | 1.50ct PEAR FANCY VS1 | natural | 96 | $5,403 SGD |
| 40 | 1.50ct OVAL L SI2 | natural | 96 | $6,164 SGD |
| 41 | 1.50ct ROUND L SI2 | natural | 96 | $6,406 SGD |
| 42 | 1.01ct PEAR FANCY SI2 | natural | 96 | $2,009 SGD |
| 43 | 1.01ct HEART K VS2 | natural | 96 | $2,263 SGD |
| 44 | 1.01ct PEAR FANCY SI1 | natural | 96 | $3,756 SGD |
| 45 | 1.01ct RADIANT FANCY LIGHT YELLOW VS1 | natural | 96 | $4,623 SGD |
| 46 | 1.01ct CUSHION FANCY SI2 | natural | 96 | $6,236 SGD |
| 47 | 0.90ct ROUND K VS1 | natural | 96 | $3,645 SGD |
| 48 | 0.81ct ROUND GREY VS2 | natural | 96 | $1,413 SGD |
| 49 | 0.79ct OVAL FANCY VS1 | natural | 96 | $14,945 SGD |
| 50 | 0.70ct HEART FANCY SI2 | natural | 96 | $1,650 SGD |
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