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Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2554019948

Certificate GIA 2554019948

Diamond specifications and retailer prices

From HK$17,861 HKD
As of November 6, 2026
Save HK$24,735 HKD (58%) vs most expensive(unlock to see where)
31 retailers carry this diamond
Most expensive: HK$42,596 HKD at NZ Jewellers · As of October 20, 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 2554019948. Listed at 31 retailers as of November 6, 2026, with a 138% 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
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2554019948
Dimensions6.75 × 6.79 × 4.23 mm
L/W Ratio1.01
Star length50%
Top View
6.75 mm6.79 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554019948
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°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 6
Current: HK$22,964 HKD|Low: HK$17,861 HKD|High: HK$41,374 HKD|Avg: HK$25,903 HKD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 9HK$17,861 HKD
Retailer 2HK$20,440 HKD
Retailer 11HK$22,148 HKD
Retailer 1HK$22,964 HKD
Retailer 6HK$23,222 HKD
Retailer 4HK$24,296 HKD
Retailer 12HK$24,296 HKD
Retailer 3HK$25,080 HKD
Retailer 8HK$25,142 HKD
Retailer 10HK$28,215 HKD
Retailer 5HK$28,434 HKD
Retailer 7HK$40,668 HKD

34 data points across 12 retailers

31 retailersHK$17,861 HKD to HK$42,596 HKD

A
Cheapest Retailer
-
HK$17,861 HKD
A
Retailer 2
-
HK$19,836 HKD
View
A
Retailer 3
-
HK$20,440 HKD
View
Final sale: no returns
B+
Retailer 4
-
HK$22,148 HKD
View
Retailer 5
-
HK$22,148 HKD
View
Price last confirmed 54 days ago
Retailer 6
-
HK$22,148 HKD
View
Price last confirmed 51 days ago
Retailer 7
-
HK$22,148 HKD
View
Price last confirmed 22 days ago
Retailer 8
-
HK$22,148 HKD
View
Price last confirmed 30 days ago
Retailer 9
-
HK$22,148 HKD
View
Price last confirmed 16 days ago
B+
Retailer 10
-
HK$22,391 HKD
View
B+
Retailer 11
-
HK$22,964 HKD
View
Retailer 12
-
HK$23,003 HKD
View
Price last confirmed 39 days ago
B+
Retailer 13
-
HK$23,222 HKD
View
B+
Retailer 14
-
HK$24,296 HKD
View
B+
Retailer 15
-
HK$24,296 HKD
View
B+
Retailer 16
-
HK$25,080 HKD
View
B+
Retailer 17
-
HK$25,142 HKD
View
Retailer 18
-
HK$25,558 HKD
View
Price last confirmed 29 days ago
Retailer 19
-
HK$25,558 HKD
View
Price last confirmed 54 days ago
Retailer 20
-
HK$25,558 HKD
View
Price last confirmed 47 days ago
Retailer 21
-
HK$25,558 HKD
View
Price last confirmed 17 days ago
B+
Retailer 22
-
HK$25,558 HKD
View
B+
Retailer 23
-
HK$28,215 HKD
View
Retailer 24
-
HK$28,379 HKD
View
Price last confirmed 23 days ago
B+
Retailer 25
-
HK$28,434 HKD
View
B
Retailer 26
-
HK$40,668 HKD
View
Retailer 27
-
HK$42,596 HKD
View
Price last confirmed 29 days ago
B
Retailer 28
-
HK$42,596 HKD
View
Retailer 29
-
HK$42,596 HKD
View
Price last confirmed 48 days ago
Retailer 30
-
HK$42,596 HKD
View
Price last confirmed 55 days ago
Most Expensive
NZ Jewellers
24d6ce57-5de8-432d-9b87-8fbf5ceb647d · Oct 20
HK$42,596 HKD
$5,435 USD
View
Price last confirmed 18 days ago
30 more retailers have this diamond
Prices start from HK$17,861 HKDSave up to HK$24,735 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$17,861 HKD