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Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2518450103

Certificate GIA 2518450103

Diamond specifications and retailer prices

From HK$30,174 HKD
As of November 6, 2026
Save HK$31,890 HKD (51%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$62,064 HKD at NZ Jewellers · As of November 5, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2518450103. Listed at 14 retailers as of November 5, 2026, with prices from HK$30,174 to HK$62,064, a HK$31,890 spread on the same certified stone. NZ Jewellers lists it at HK$62,064. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.29°
Pavilion angle30.5°
OriginNatural
Grading LabGIA
CertificateGIA 2518450103
Dimensions6.67 × 5.23 × 3.64 mm
L/W Ratio1.28
Top View
6.67 mm5.23 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2518450103
Side View
Table 65.0%Crown 44.29°Girdle: THK-VTKPavilion 30.5°Culet: NoneDepth 69.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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$62,064 HKD|Low: HK$30,174 HKD|High: HK$64,196 HKD|Avg: HK$41,411 HKD|-3.3%
NZ Jewellers
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
November 7, 2026
Retailer 5HK$30,174 HKD
Retailer 10HK$30,754 HKD
Retailer 4HK$31,930 HKD
Retailer 12HK$33,113 HKD
Retailer 2HK$35,409 HKD
Retailer 6HK$35,480 HKD
Retailer 3HK$36,679 HKD
Retailer 13HK$36,679 HKD
Retailer 7HK$37,839 HKD
Retailer 14HK$37,933 HKD
Retailer 8HK$38,270 HKD
Retailer 11HK$52,032 HKD
Retailer 9HK$56,578 HKD
NZ JewellersHK$62,064 HKD

43 data points across 14 retailers

14 retailersHK$30,174 HKD to HK$62,064 HKD

B+
Cheapest Retailer
-
HK$30,174 HKD
B+
Retailer 2
-
HK$30,754 HKD
View
B+
Retailer 3
-
HK$31,930 HKD
View
B+
Retailer 4
-
HK$33,113 HKD
View
B+
Retailer 5
-
HK$35,409 HKD
View
B+
Retailer 6
-
HK$35,480 HKD
View
B+
Retailer 7
-
HK$36,679 HKD
View
B+
Retailer 8
-
HK$36,679 HKD
View
B
Retailer 9
-
HK$37,839 HKD
View
B
Retailer 10
-
HK$37,933 HKD
View
B+
Retailer 11
-
HK$38,270 HKD
View
B
Retailer 12
-
HK$52,032 HKD
View
B
Retailer 13
-
HK$56,578 HKD
View
Most Expensive
B
NZ Jewellers
c41f34da-ef32-4739-bab4-64ae197ec1fe · Nov 5
HK$62,064 HKD
$7,919 USD
View
13 more retailers have this diamond
Prices start from HK$30,174 HKDSave up to HK$31,890 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$30,174 HKD