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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 $3,036 AUD
As of November 6, 2026
Save $2,766 AUD (48%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,802 AUD 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 $3,036 to $5,802, a $2,766 spread on the same certified stone. MOH London lists it at $5,802. 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: $5,802 AUD|Low: $2,529 AUD|High: $5,959 AUD|Avg: $3,830 AUD|-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$3,036 AUD
Retailer 2$3,072 AUD
Retailer 9$3,259 AUD
Retailer 6$3,362 AUD
Retailer 5$3,368 AUD
Retailer 4$4,101 AUD
Retailer 3$4,133 AUD
Retailer 8$4,152 AUD
MOH London$5,802 AUD

38 data points across 9 retailers

12 retailers$3,036 AUD to $5,802 AUD

B+
Cheapest Retailer
-
$3,036 AUD
B+
Retailer 2
-
$3,072 AUD
View
Final sale: no returns
B
Retailer 3
-
$3,259 AUD
View
B
Retailer 4
-
$3,362 AUD
View
B
Retailer 5
-
$3,368 AUD
View
B
Retailer 6
-
$3,390 AUD
View
B
Retailer 7
-
$3,563 AUD
View
B
Retailer 8
-
$3,687 AUD
View
B
Retailer 9
-
$4,101 AUD
View
B
Retailer 10
-
$4,133 AUD
View
Retailer 11
-
$4,152 AUD
View
Price last confirmed 34 days ago
Most Expensive
C
MOH London
CA0DCDDA5 · Nov 7
$5,802 AUD
£3,139 GBP
View
11 more retailers have this diamond
Prices start from $3,036 AUDSave up to $2,766 AUD

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
$3,036 AUD