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Marquise|Natural|GIA

1.23ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 2233984750

Certificate GIA 2233984750

Diamond specifications and retailer prices

From $4,555 AUD
As of November 4, 2026
Save $3,781 AUD (45%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,269 AUD at MOH London · As of October 8, 2026
View at MOH London

About this 1.23ct natural marquise diamond

This 1.23ct natural marquise 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 2233984750. Listed at 10 retailers as of November 4, 2026, with a 83% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishGood
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2233984750
Dimensions11.56 × 6.12 × 2.79 mm
L/W Ratio1.89
Top View
11.56 mm6.12 mm1.23 ctJ / SI1
OriginNatural
CutGood
PolishGood
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2233984750
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: SmallDepth 45.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $10,269 AUD|Low: $4,285 AUD|High: $10,295 AUD|Avg: $6,218 AUD|+3.6%
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
October 24, 2026
Retailer 7$4,555 AUD
Retailer 2$4,585 AUD
Retailer 6$4,713 AUD
Retailer 13$4,893 AUD
Retailer 5$4,966 AUD
Retailer 8$5,174 AUD
Retailer 12$5,506 AUD
Retailer 11$6,522 AUD
Retailer 9$6,826 AUD
Retailer 4$6,883 AUD
Retailer 3$7,334 AUD
Retailer 10$8,337 AUD
MOH London$10,269 AUD

17 data points across 13 retailers

10 retailers$4,555 AUD to $8,337 AUD

B
Cheapest Retailer
-
$4,555 AUD
B
Retailer 2
-
$4,585 AUD
View
B
Retailer 3
-
$4,713 AUD
View
Final sale: no returns
B
Retailer 4
-
$4,966 AUD
View
B
Retailer 5
-
$5,174 AUD
View
Retailer 6
-
$6,522 AUD
View
Price last confirmed 34 days ago
Retailer 7
-
$6,883 AUD
View
Price last confirmed 30 days ago
Retailer 8
-
$7,334 AUD
View
Price last confirmed 38 days ago
C
Retailer 9
-
$8,337 AUD
View
Most Expensive
MOH London
59763D0AB · Oct 8
$10,269 AUD
£5,556 GBP
View
Price last confirmed 29 days ago
9 more retailers have this diamond
Prices start from $4,555 AUDSave up to $3,781 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 Marquise
$4,555 AUD