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 $2,886 NZD
As of November 6, 2026
Save $3,872 NZD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,758 NZD 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 $2,886 to $6,758, a $3,872 spread on the same certified stone. MOH London lists it at $6,758. 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: $6,758 NZD|Low: $2,886 NZD|High: $6,880 NZD|Avg: $4,250 NZD|-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 11$2,886 NZD
Retailer 5$3,032 NZD
Retailer 8$3,590 NZD
Retailer 3$3,880 NZD
Retailer 6$4,023 NZD
Retailer 10$4,041 NZD
Retailer 12$4,106 NZD
Retailer 2$4,189 NZD
Retailer 4$4,448 NZD
Retailer 9$4,706 NZD
Retailer 7$5,240 NZD
MOH London$6,758 NZD

30 data points across 12 retailers

14 retailers$2,886 NZD to $6,758 NZD

A
Cheapest Retailer
-
$2,886 NZD
A
Retailer 2
-
$3,032 NZD
View
B+
Retailer 3
-
$3,590 NZD
View
B+
Retailer 4
-
$3,657 NZD
View
Retailer 5
-
$3,880 NZD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$4,023 NZD
View
B+
Retailer 7
-
$4,041 NZD
View
B+
Retailer 8
-
$4,053 NZD
View
B+
Retailer 9
-
$4,106 NZD
View
B+
Retailer 10
-
$4,189 NZD
View
B
Retailer 11
-
$4,706 NZD
View
Retailer 12
-
$4,798 NZD
View
Price last confirmed 32 days ago
B
Retailer 13
-
$5,240 NZD
View
Most Expensive
B
MOH London
599C3FF43 · Nov 2
$6,758 NZD
£2,950 GBP
View
13 more retailers have this diamond
Prices start from $2,886 NZDSave up to $3,872 NZD

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
$2,886 NZD