Top 50 Diamonds by Certification Score in Hong Kong

Ranked by certificate rigour. GIA and AGS stones with complete grading, clear symmetry, and verified provenance come out on top. Pricing shown in HKD.

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.

#DiamondOriginScoreLowest Price (HKD)
18.04ct ROUND K SI1natural100HK$970,412 HKD
28.03ct OVAL G VS2natural100HK$3,075,214 HKD
37.03ct CUSHION F VS2natural100HK$2,338,900 HKD
47.01ct PEAR I SI2natural100HK$702,240 HKD
55.30ct CUSHION D FLnatural100HK$1,498,507 HKD
65.02ct OVAL H SI1natural100HK$856,930 HKD
75.01ct ROUND H SI2natural100HK$361,270 HKD
85.01ct CUSHION G SI1natural100HK$511,132 HKD
94.50ct ROUND H VVS1natural100HK$297,471 HKD
104.07ct OVAL H VVS2natural100HK$554,414 HKD
114.03ct PRINCESS I VS2natural100HK$393,477 HKD
124.03ct HEART E VS2natural100HK$629,403 HKD
134.02ct HEART H SI1natural100HK$312,654 HKD
144.01ct ROUND J SI1natural100HK$234,634 HKD
154.01ct ROUND H SI2natural100HK$263,340 HKD
163.52ct OVAL J SI1natural100HK$236,447 HKD
173.33ct ASSCHER L VS1natural100HK$177,430 HKD
183.10ct HEART I SI2natural100HK$99,154 HKD
193.05ct OVAL K SI1natural100HK$137,912 HKD
203.04ct HEART I SI2natural100HK$88,486 HKD
213.04ct OVAL J SI2natural100HK$126,445 HKD
223.02ct RADIANT H SI2natural100HK$232,520 HKD
233.02ct ROUND F VS1natural100HK$564,413 HKD
243.01ct CUSHION J VS2natural100HK$81,897 HKD
253.01ct OVAL I SI2natural100HK$110,686 HKD
263.01ct ROUND H SI2natural100HK$119,833 HKD
273.01ct ROUND F SI2natural100HK$141,103 HKD
283.01ct OVAL J SI2natural100HK$164,499 HKD
293.01ct OVAL K SI1natural100HK$172,831 HKD
303.01ct OVAL F SI1natural100HK$308,940 HKD
313.01ct OVAL G VVS2natural100HK$324,558 HKD
323.01ct ROUND G VS2natural100HK$407,953 HKD
332.68ct CUSHION D VS1natural100HK$155,378 HKD
342.53ct ROUND I SI2natural100HK$127,373 HKD
352.52ct OVAL D VS1natural100HK$362,317 HKD
362.51ct OVAL D VVS1natural100HK$278,986 HKD
372.50ct ROUND H VVS2natural100HK$150,872 HKD
382.42ct ROUND I VVS1natural100HK$108,882 HKD
392.34ct ROUND G SI2natural100HK$62,991 HKD
402.20ct HEART I VS2natural100HK$125,474 HKD
412.20ct ROUND H VS1natural100HK$176,682 HKD
422.12ct ROUND E VVS1natural100HK$222,663 HKD
432.08ct ASSCHER F VS2natural100HK$127,552 HKD
442.05ct ROUND H VS1natural100HK$83,007 HKD
452.04ct ROUND I SI1natural100HK$102,928 HKD
462.03ct ROUND H VS1natural100HK$109,376 HKD
472.03ct EMERALD D VVS1natural100HK$277,612 HKD
482.02ct OVAL I SI1natural100HK$84,959 HKD
492.02ct ASSCHER J VVS1natural100HK$100,592 HKD
502.02ct CUSHION F SI1natural100HK$132,768 HKD
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