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Heart|Natural|GIA

1.21ct J SI1 Heart Natural Diamond

GD • J/SI1 • GIA 7458197631

Certificate GIA 7458197631

Diamond specifications and retailer prices

From $3,763 NZD
As of November 6, 2026
Save $3,428 NZD (48%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,191 NZD at MOH London · As of November 7, 2026
View at MOH London

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 7458197631. Listed at 12 retailers as of November 6, 2026, with prices from $3,763 to $7,191, a $3,428 spread on the same certified stone. MOH London lists it at $7,191. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7458197631
Dimensions6.47 × 5.84 × 3.91 mm
L/W Ratio1.11
Top View
6.47 mm5.84 mm1.21 ctJ / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 7458197631
Side View
Table 65.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.0%

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: $7,191 NZD|Low: $3,135 NZD|High: $7,386 NZD|Avg: $4,747 NZD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 7$3,763 NZD
Retailer 2$3,808 NZD
Retailer 9$4,039 NZD
Retailer 6$4,167 NZD
Retailer 5$4,174 NZD
Retailer 4$5,083 NZD
Retailer 3$5,123 NZD
Retailer 8$5,147 NZD
MOH London$7,191 NZD

38 data points across 9 retailers

12 retailers$3,763 NZD to $7,191 NZD

B+
Cheapest Retailer
-
$3,763 NZD
B+
Retailer 2
-
$3,808 NZD
View
Final sale: no returns
B
Retailer 3
-
$4,039 NZD
View
B
Retailer 4
-
$4,167 NZD
View
B
Retailer 5
-
$4,174 NZD
View
B
Retailer 6
-
$4,201 NZD
View
B
Retailer 7
-
$4,416 NZD
View
B
Retailer 8
-
$4,569 NZD
View
B
Retailer 9
-
$5,083 NZD
View
B
Retailer 10
-
$5,123 NZD
View
Retailer 11
-
$5,147 NZD
View
Price last confirmed 34 days ago
Most Expensive
C
MOH London
CA0DCDDA5 · Nov 7
$7,191 NZD
£3,139 GBP
View
11 more retailers have this diamond
Prices start from $3,763 NZDSave up to $3,428 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.

B+
1.21ct Heart
$3,763 NZD