CaratHunter
Plans
Heart|Natural|GIA

1.23ct F SI1 Heart Natural Diamond

GD • F/SI1 • GIA 2278523940

Certificate GIA 2278523940

Diamond specifications and retailer prices

From $4,259 NZD
As of November 6, 2026
Save $4,777 NZD (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,036 NZD 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 $4,259 to $9,036, a $4,777 spread on the same certified stone. MOH London lists it at $9,036. 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: $9,036 NZD|Low: $3,550 NZD|High: $10,305 NZD|Avg: $5,690 NZD|-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$4,259 NZD
Retailer 7$4,396 NZD
Retailer 3$4,412 NZD
Retailer 19$4,528 NZD
Retailer 20$4,632 NZD
Retailer 12$4,811 NZD
Retailer 18$4,825 NZD
Retailer 6$4,908 NZD
Retailer 10$4,972 NZD
Retailer 11$5,009 NZD
Retailer 16$5,325 NZD
Retailer 5$5,460 NZD
Retailer 2$5,749 NZD
Retailer 8$5,787 NZD
Retailer 14$5,940 NZD
Retailer 4$6,122 NZD
Retailer 15$6,611 NZD
Retailer 13$6,705 NZD
Retailer 9$7,809 NZD
MOH London$9,036 NZD

41 data points across 20 retailers

21 retailers$4,259 NZD to $9,036 NZD

B+
Cheapest Retailer
-
$4,259 NZD
B+
Retailer 2
-
$4,396 NZD
View
B+
Retailer 3
-
$4,412 NZD
View
B+
Retailer 4
-
$4,528 NZD
View
Final sale: no returns
B+
Retailer 5
-
$4,632 NZD
View
B+
Retailer 6
-
$4,811 NZD
View
B+
Retailer 7
-
$4,825 NZD
View
Retailer 8
-
$4,908 NZD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
$4,972 NZD
View
Retailer 10
-
$5,009 NZD
View
Price last confirmed 23 days ago
B
Retailer 11
-
$5,325 NZD
View
B
Retailer 12
-
$5,460 NZD
View
B
Retailer 13
-
$5,749 NZD
View
B
Retailer 14
-
$5,778 NZD
View
Retailer 15
-
$5,787 NZD
View
Price last confirmed 31 days ago
B+
Retailer 16
-
$5,940 NZD
View
B
Retailer 17
-
$6,122 NZD
View
B
Retailer 18
-
$6,611 NZD
View
B
Retailer 19
-
$6,705 NZD
View
B
Retailer 20
-
$7,809 NZD
View
Most Expensive
B
MOH London
45AC09C87 · Nov 4
$9,036 NZD
£3,944 GBP
View
20 more retailers have this diamond
Prices start from $4,259 NZDSave up to $4,777 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+
1.23ct Heart
$4,259 NZD