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Radiant|Natural|GIA

1.21ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 2557272200

Certificate GIA 2557272200

Diamond specifications and retailer prices

From HK$13,441 HKD
As of November 6, 2026
Save HK$18,026 HKD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: HK$37,565 HKD at NZ Jewellers · As of October 17, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557272200. Listed at 18 retailers as of November 2, 2026, with a 134% 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557272200
Dimensions7.08 × 5.46 × 3.67 mm
L/W Ratio1.30
Girdle conditionPolished
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
7.08 mm5.46 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557272200
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.1%

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$19,523 HKD|Low: HK$13,441 HKD|High: HK$31,859 HKD|Avg: HK$20,823 HKD|+1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 7HK$13,441 HKD
Retailer 2HK$14,115 HKD
Retailer 8HK$16,584 HKD
Retailer 3HK$18,755 HKD
Retailer 1HK$19,523 HKD
Retailer 5HK$21,929 HKD
Retailer 9HK$22,117 HKD
Retailer 4HK$22,305 HKD
Retailer 6HK$31,467 HKD

36 data points across 9 retailers

18 retailersHK$13,441 HKD to HK$31,467 HKD

A
Cheapest Retailer
-
HK$13,441 HKD
A
Retailer 2
-
HK$14,115 HKD
View
B+
Retailer 3
-
HK$16,584 HKD
View
Final sale: no returns
B+
Retailer 4
-
HK$16,843 HKD
View
B+
Retailer 5
-
HK$16,850 HKD
View
Retailer 6
-
HK$17,963 HKD
View
Price last confirmed 22 days ago
Retailer 7
-
HK$17,963 HKD
View
Price last confirmed 20 days ago
B+
Retailer 8
-
HK$18,755 HKD
View
Retailer 9
-
HK$18,794 HKD
View
Price last confirmed 22 days ago
B+
Retailer 10
-
HK$19,053 HKD
View
B
Retailer 11
-
HK$19,499 HKD
View
B+
Retailer 12
-
HK$19,523 HKD
View
Retailer 13
-
HK$20,730 HKD
View
Price last confirmed 19 days ago
B+
Retailer 14
-
HK$21,929 HKD
View
Retailer 15
-
HK$22,117 HKD
View
Price last confirmed 31 days ago
B+
Retailer 16
-
HK$22,305 HKD
View
B
Retailer 17
-
HK$31,467 HKD
View
Most Expensive
NZ Jewellers
994bbfa0-a063-4806-8502-135ace74179e · Oct 17
HK$37,565 HKD
$4,793 USD
View
Price last confirmed 20 days ago
17 more retailers have this diamond
Prices start from HK$13,441 HKDSave up to HK$18,026 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 Radiant
HK$13,441 HKD