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Oval|Natural|GIA

1.23ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 6551369856

Certificate GIA 6551369856

Diamond specifications and retailer prices

From $2,947 AUD
As of November 7, 2026
Save $2,321 AUD (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,321 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.23ct natural oval diamond

This 1.23ct natural oval sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551369856. Listed at 15 retailers as of November 7, 2026, with a 79% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.23
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6551369856
Dimensions8.60 × 5.91 × 3.71 mm
L/W Ratio1.46
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
8.60 mm5.91 mm1.23 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6551369856
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.8%

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 7
Current: $3,285 AUD|Low: $2,947 AUD|High: $5,362 AUD|Avg: $3,775 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$2,947 AUD
Retailer 2$3,024 AUD
Retailer 8$3,027 AUD
Retailer 4$3,228 AUD
Retailer 6$3,283 AUD
Retailer 1$3,285 AUD
Retailer 7$3,689 AUD
Retailer 10$3,739 AUD
Retailer 9$4,129 AUD
Retailer 5$5,269 AUD

43 data points across 10 retailers

15 retailers$2,947 AUD to $5,269 AUD

B+
Cheapest Retailer
-
$2,947 AUD
Retailer 2
-
$3,024 AUD
View
Price last confirmed 37 days ago
B+
Retailer 3
-
$3,027 AUD
View
Retailer 4
-
$3,163 AUD
View
Price last confirmed 39 days ago
B+
Retailer 5
-
$3,228 AUD
View
B+
Retailer 6
-
$3,283 AUD
View
B+
Retailer 7
-
$3,285 AUD
View
Retailer 8
-
$3,489 AUD
View
Price last confirmed 67 days ago
Retailer 9
-
$3,489 AUD
View
Price last confirmed 39 days ago
B+
Retailer 10
-
$3,689 AUD
View
Retailer 11
-
$3,739 AUD
View
Price last confirmed 35 days ago
B+
Retailer 12
-
$4,129 AUD
View
B
Retailer 13
-
$5,269 AUD
View
Retailer 14
-
$6,321 AUD
View
Price last confirmed 70 days ago
Most Expensive
NZ Jewellers
965272af-a8f6-45d1-8c3b-2f97d582e26d · Sep 30
$6,321 AUD
$4,343 USD
View
Price last confirmed 38 days ago
14 more retailers have this diamond
Prices start from $2,947 AUDSave up to $2,321 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 Oval
$2,947 AUD