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Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2556128158

Certificate GIA 2556128158

Diamond specifications and retailer prices

From HK$19,398 HKD
As of November 7, 2026
5 retailers carry this diamond
Most expensive: HK$41,577 HKD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556128158. Listed at 5 retailers as of November 7, 2026. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556128158
Dimensions7.11 × 5.26 × 3.57 mm
L/W Ratio1.35
Top View
7.11 mm5.26 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556128158
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: HK$18,778 HKD|Low: HK$14,640 HKD|High: HK$36,256 HKD|Avg: HK$21,141 HKD|-0.3%
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
October 6, 2026
Retailer 10HK$14,640 HKD
Retailer 17HK$14,907 HKD
Retailer 11HK$15,009 HKD
Retailer 12HK$16,122 HKD
Retailer 4HK$17,493 HKD
Retailer 13HK$18,340 HKD
Retailer 15HK$18,512 HKD
Retailer 1HK$18,778 HKD
Retailer 5HK$19,398 HKD
Retailer 7HK$20,377 HKD
Retailer 8HK$20,377 HKD
Retailer 9HK$21,083 HKD
Retailer 2HK$24,280 HKD
Retailer 6HK$24,868 HKD
Retailer 14HK$27,901 HKD
Retailer 3HK$30,080 HKD
Retailer 16HK$34,712 HKD

12 data points across 17 retailers

5 retailers

Retailer 1
-
HK$14,640 HKD
Price last confirmed 33 days ago
Retailer 2
-
HK$18,340 HKD
View
Price last confirmed 34 days ago
B+
Retailer 3
-
HK$19,398 HKD
View
Retailer 4
-
HK$34,712 HKD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
43dc02b9-5f31-4cb3-aa5c-7ce9f778202a · Sep 25
HK$41,577 HKD
$5,305 USD
View
Price last confirmed 42 days ago
4 more retailers have this diamond
Prices start from HK$19,398 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.

B+
1.21ct Radiant
HK$19,398 HKD