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	5.12ct OVAL E VVS2	lab grown	100	$13,123 SGD
2	5.11ct HEART D IF	lab grown	100	$17,356 SGD
3	5.06ct OVAL E IF	lab grown	100	$17,186 SGD
4	5.04ct HEART E IF	lab grown	100	$14,429 SGD
5	4.71ct HEART D IF	lab grown	100	$11,642 SGD
6	4.56ct OVAL D VVS1	lab grown	100	$14,916 SGD
7	4.24ct ROUND D VVS1	lab grown	100	$5,950 SGD
8	4.22ct ROUND D VVS1	lab grown	100	$5,362 SGD
9	4.21ct OVAL D VVS1	lab grown	100	$8,526 SGD
10	4.16ct HEART D IF	lab grown	100	$10,670 SGD
11	3.96ct OVAL D FL	lab grown	100	$17,265 SGD
12	3.91ct OVAL E VS1	lab grown	100	$1,678 SGD
13	3.79ct ASSCHER D FL	lab grown	100	$16,486 SGD
14	3.67ct PRINCESS D VVS1	lab grown	100	$5,288 SGD
15	3.62ct ASSCHER G VVS2	lab grown	100	$2,826 SGD
16	3.60ct OVAL E VVS1	lab grown	100	$10,012 SGD
17	3.57ct HEART D IF	lab grown	100	$6,881 SGD
18	3.52ct OVAL E VS2	lab grown	100	$8,449 SGD
19	3.51ct MARQUISE E VS2	lab grown	100	$2,249 SGD
20	3.42ct ROUND E VVS1	lab grown	100	$3,297 SGD
21	3.28ct ROUND F VS1	lab grown	100	$903 SGD
22	3.28ct PRINCESS E VVS2	lab grown	100	$9,465 SGD
23	3.26ct OVAL E IF	lab grown	100	$5,744 SGD
24	3.17ct ROUND D VVS1	lab grown	100	$1,259 SGD
25	3.09ct CUSHION D VVS2	lab grown	100	$3,636 SGD
26	3.08ct OVAL G VS1	lab grown	100	$2,786 SGD
27	3.07ct OVAL E VS2	lab grown	100	$1,577 SGD
28	3.07ct OVAL G VS1	lab grown	100	$2,668 SGD
29	3.05ct OVAL E VS2	lab grown	100	$1,572 SGD
30	3.04ct ROUND D VVS1	lab grown	100	$3,226 SGD
31	3.03ct OVAL D VVS1	lab grown	100	$4,462 SGD
32	3.02ct EMERALD D VS1	lab grown	100	$1,107 SGD
33	3.02ct OVAL E VS2	lab grown	100	$2,632 SGD
34	3.02ct OVAL D VVS1	lab grown	100	$4,447 SGD
35	3.02ct HEART D IF	lab grown	100	$5,884 SGD
36	3.01ct ROUND F VS1	lab grown	100	$830 SGD
37	3.01ct OVAL D VS1	lab grown	100	$6,670 SGD
38	3.01ct ROUND D IF	lab grown	100	$11,088 SGD
39	2.94ct OVAL E VS1	lab grown	100	$2,592 SGD
40	2.92ct OVAL E VS1	lab grown	100	$2,575 SGD
41	2.90ct HEART D VVS1	lab grown	100	$2,714 SGD
42	2.84ct RADIANT E VS1	lab grown	100	$1,207 SGD
43	2.80ct HEART D IF	lab grown	100	$4,705 SGD
44	2.71ct OVAL F VS2	lab grown	100	$4,015 SGD
45	2.70ct OVAL E VS2	lab grown	100	$2,522 SGD
46	2.67ct ROUND D VVS1	lab grown	100	$2,737 SGD
47	2.64ct OVAL D VVS1	lab grown	100	$6,403 SGD
48	2.61ct OVAL D VS2	lab grown	100	$1,732 SGD
49	2.58ct OVAL F VS1	lab grown	100	$915 SGD
50	2.58ct RADIANT F VS1	lab grown	100	$2,269 SGD

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