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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 $3,752 NZD
As of November 7, 2026
Save $2,794 NZD (43%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,834 NZD 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 12 retailers as of November 4, 2026, with a 74% 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: $4,070 NZD|Low: $3,749 NZD|High: $6,646 NZD|Avg: $4,687 NZD|+3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 7$3,749 NZD
Retailer 4$3,752 NZD
Retailer 1$4,070 NZD
Retailer 2$4,573 NZD
Retailer 6$4,634 NZD
Retailer 5$5,118 NZD
Retailer 3$6,546 NZD

43 data points across 7 retailers

12 retailers$3,752 NZD to $6,546 NZD

Retailer 1
-
$3,749 NZD
Price last confirmed 37 days ago
B+
Retailer 2
-
$3,752 NZD
View
Retailer 3
-
$3,920 NZD
View
Price last confirmed 39 days ago
B+
Retailer 4
-
$4,070 NZD
View
Retailer 5
-
$4,324 NZD
View
Price last confirmed 67 days ago
Retailer 6
-
$4,324 NZD
View
Price last confirmed 39 days ago
B+
Retailer 7
-
$4,573 NZD
View
Retailer 8
-
$4,634 NZD
View
Price last confirmed 35 days ago
B+
Retailer 9
-
$5,118 NZD
View
B
Retailer 10
-
$6,546 NZD
View
Retailer 11
-
$7,834 NZD
View
Price last confirmed 70 days ago
Most Expensive
NZ Jewellers
965272af-a8f6-45d1-8c3b-2f97d582e26d · Sep 30
$7,834 NZD
$4,343 USD
View
Price last confirmed 37 days ago
11 more retailers have this diamond
Prices start from $3,752 NZDSave up to $2,794 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 Oval
$3,752 NZD