CaratHunter
Plans
Radiant|Natural|GIA

1.21ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 2558197624

Certificate GIA 2558197624

Diamond specifications and retailer prices

From HK$12,540 HKD
As of November 6, 2026
Save HK$16,823 HKD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$29,363 HKD at MOH London · As of November 2, 2026
View at MOH London

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 2558197624. Listed at 14 retailers as of November 2, 2026, with prices from HK$12,540 to HK$29,363, a HK$16,823 spread on the same certified stone. MOH London lists it at HK$29,363. 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 2558197624
Dimensions7.23 × 5.56 × 3.78 mm
L/W Ratio1.30
Top View
7.23 mm5.56 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2558197624
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.0%

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$29,363 HKD|Low: HK$12,540 HKD|High: HK$29,890 HKD|Avg: HK$18,467 HKD|-1.8%
MOH London
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 11HK$12,540 HKD
Retailer 5HK$13,175 HKD
Retailer 8HK$15,596 HKD
Retailer 3HK$16,858 HKD
Retailer 6HK$17,477 HKD
Retailer 10HK$17,556 HKD
Retailer 12HK$17,838 HKD
Retailer 2HK$18,198 HKD
Retailer 4HK$19,327 HKD
Retailer 9HK$20,448 HKD
Retailer 7HK$22,768 HKD
MOH LondonHK$29,363 HKD

30 data points across 12 retailers

14 retailersHK$12,540 HKD to HK$29,363 HKD

A
Cheapest Retailer
-
HK$12,540 HKD
A
Retailer 2
-
HK$13,175 HKD
View
B+
Retailer 3
-
HK$15,596 HKD
View
B+
Retailer 4
-
HK$15,886 HKD
View
Retailer 5
-
HK$16,858 HKD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
HK$17,477 HKD
View
B+
Retailer 7
-
HK$17,556 HKD
View
B+
Retailer 8
-
HK$17,611 HKD
View
B+
Retailer 9
-
HK$17,838 HKD
View
B+
Retailer 10
-
HK$18,198 HKD
View
B
Retailer 11
-
HK$20,448 HKD
View
Retailer 12
-
HK$20,847 HKD
View
Price last confirmed 32 days ago
B
Retailer 13
-
HK$22,768 HKD
View
Most Expensive
B
MOH London
599C3FF43 · Nov 2
HK$29,363 HKD
£2,950 GBP
View
13 more retailers have this diamond
Prices start from HK$12,540 HKDSave up to HK$16,823 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$12,540 HKD