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Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6431629525

Certificate GIA 6431629525

Diamond specifications and retailer prices

From HK$22,031 HKD
As of November 1, 2026
Save HK$23,136 HKD (51%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: HK$47,314 HKD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6431629525. Listed at 24 retailers as of November 1, 2026, with a 105% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6431629525
Dimensions6.84 × 6.80 × 4.23 mm
L/W Ratio1.01
Top View
6.84 mm6.80 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6431629525
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$45,167 HKD|Low: HK$22,031 HKD|High: HK$46,891 HKD|Avg: HK$29,952 HKD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 7, 2026
Retailer 17HK$22,031 HKD
Retailer 16HK$22,337 HKD
Retailer 18HK$22,540 HKD
Retailer 8HK$23,191 HKD
Retailer 10HK$24,758 HKD
Retailer 5HK$25,754 HKD
Retailer 4HK$26,921 HKD
Retailer 7HK$27,157 HKD
Retailer 12HK$27,925 HKD
Retailer 2HK$27,980 HKD
Retailer 19HK$27,980 HKD
Retailer 6HK$28,622 HKD
Retailer 3HK$28,920 HKD
Retailer 15HK$30,096 HKD
Retailer 9HK$32,314 HKD
Retailer 13HK$34,343 HKD
Retailer 14HK$39,595 HKD
Retailer 1HK$45,167 HKD
Retailer 11HK$46,891 HKD

23 data points across 19 retailers

24 retailersHK$22,031 HKD to HK$45,167 HKD

A
Cheapest Retailer
-
HK$22,031 HKD
A
Retailer 2
-
HK$22,337 HKD
View
A
Retailer 3
-
HK$22,540 HKD
View
Retailer 4
-
HK$23,191 HKD
View
Price last confirmed 19 days ago
B+
Retailer 5
-
HK$24,758 HKD
View
B+
Retailer 6
-
HK$25,754 HKD
View
B+
Retailer 7
-
HK$26,921 HKD
View
Retailer 8
-
HK$27,157 HKD
View
Price last confirmed 57 days ago
Retailer 9
-
HK$27,157 HKD
View
Price last confirmed 22 days ago
Retailer 10
-
HK$27,157 HKD
View
Price last confirmed 20 days ago
B+
Retailer 11
-
HK$27,925 HKD
View
B+
Retailer 12
-
HK$27,980 HKD
View
B+
Retailer 13
-
HK$27,980 HKD
View
Retailer 14
-
HK$28,199 HKD
View
Price last confirmed 23 days ago
B
Retailer 15
-
HK$28,622 HKD
View
B
Retailer 16
-
HK$28,920 HKD
View
B
Retailer 17
-
HK$30,096 HKD
View
Retailer 18
-
HK$31,334 HKD
View
Price last confirmed 61 days ago
Retailer 19
-
HK$31,334 HKD
View
Price last confirmed 20 days ago
B
Retailer 20
-
HK$34,343 HKD
View
B
Retailer 21
-
HK$39,595 HKD
View
B
Retailer 22
-
HK$45,167 HKD
View
Retailer 23
-
HK$47,314 HKD
View
Price last confirmed 58 days ago
Most Expensive
NZ Jewellers
ed3d6f6b-3ec0-4861-8c13-5b12bee53f86 · Oct 17
HK$47,314 HKD
$6,037 USD
View
Price last confirmed 21 days ago
23 more retailers have this diamond
Prices start from HK$22,031 HKDSave up to HK$23,136 HKD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.21ct Round
HK$22,031 HKD