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Heart|Natural|GIA

1.23ct F SI1 Heart Natural Diamond

GD • F/SI1 • GIA 2278523940

Certificate GIA 2278523940

Diamond specifications and retailer prices

From $3,436 AUD
As of November 6, 2026
Save $3,854 AUD (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $7,290 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2278523940. Listed at 21 retailers as of November 4, 2026, with prices from $3,436 to $7,290, a $3,854 spread on the same certified stone. MOH London lists it at $7,290. 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

1.23
Carat
F
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2278523940
Dimensions6.44 × 6.04 × 4.10 mm
L/W Ratio1.07
Top View
6.44 mm6.04 mm1.23 ctF / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2278523940
Side View
Table 62.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 67.8%

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: $7,290 AUD|Low: $2,864 AUD|High: $8,314 AUD|Avg: $4,591 AUD|-12.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 7, 2026
Retailer 17$3,436 AUD
Retailer 7$3,547 AUD
Retailer 3$3,560 AUD
Retailer 19$3,653 AUD
Retailer 20$3,737 AUD
Retailer 12$3,882 AUD
Retailer 18$3,893 AUD
Retailer 6$3,960 AUD
Retailer 10$4,011 AUD
Retailer 11$4,042 AUD
Retailer 16$4,296 AUD
Retailer 5$4,405 AUD
Retailer 2$4,638 AUD
Retailer 8$4,669 AUD
Retailer 14$4,793 AUD
Retailer 4$4,940 AUD
Retailer 15$5,334 AUD
Retailer 13$5,410 AUD
Retailer 9$6,300 AUD
MOH London$7,290 AUD

41 data points across 20 retailers

21 retailers$3,436 AUD to $7,290 AUD

B+
Cheapest Retailer
-
$3,436 AUD
B+
Retailer 2
-
$3,547 AUD
View
B+
Retailer 3
-
$3,560 AUD
View
B+
Retailer 4
-
$3,653 AUD
View
Final sale: no returns
B+
Retailer 5
-
$3,737 AUD
View
B+
Retailer 6
-
$3,882 AUD
View
B+
Retailer 7
-
$3,893 AUD
View
Retailer 8
-
$3,960 AUD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
$4,011 AUD
View
Retailer 10
-
$4,042 AUD
View
Price last confirmed 23 days ago
B
Retailer 11
-
$4,296 AUD
View
B
Retailer 12
-
$4,405 AUD
View
B
Retailer 13
-
$4,638 AUD
View
B
Retailer 14
-
$4,662 AUD
View
Retailer 15
-
$4,669 AUD
View
Price last confirmed 31 days ago
B+
Retailer 16
-
$4,793 AUD
View
B
Retailer 17
-
$4,940 AUD
View
B
Retailer 18
-
$5,334 AUD
View
B
Retailer 19
-
$5,410 AUD
View
B
Retailer 20
-
$6,300 AUD
View
Most Expensive
B
MOH London
45AC09C87 · Nov 4
$7,290 AUD
£3,944 GBP
View
20 more retailers have this diamond
Prices start from $3,436 AUDSave up to $3,854 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+
1.23ct Heart
$3,436 AUD