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Round|Natural|GIA

1.25ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2418689032

Certificate GIA 2418689032

Diamond specifications and retailer prices

From $4,070 AUD
$2,859 USD
As of October 30, 2026
Save $4,669 AUD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,739 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2418689032. Listed at 15 retailers as of October 30, 2026, with prices from $4,070 to $8,739, a $4,669 spread on the same certified stone. NZ Jewellers lists it at $8,739. 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

1.25
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2418689032
Dimensions6.90 × 6.85 × 4.23 mm
L/W Ratio1.01
Top View
6.90 mm6.85 mm1.25 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2418689032
Side View
Table 61.0%Crown 35°Girdle: THN-STKPavilion 41°Culet: NoneDepth 61.5%

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: Oct 30
Current: $8,739 AUD|Low: $3,496 AUD|High: $8,739 AUD|Avg: $5,604 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$4,070 AUD
Retailer 7$4,195 AUD
Retailer 9$4,544 AUD
Retailer 11$4,544 AUD
Retailer 8$4,719 AUD
Retailer 5$5,211 AUD
Retailer 10$5,245 AUD
Retailer 2$5,395 AUD
Retailer 3$5,683 AUD
Retailer 4$8,389 AUD
NZ Jewellers$8,739 AUD

41 data points across 11 retailers

15 retailers$4,070 AUD to $8,739 AUD

B+
Cheapest Retailer
-
$4,070 AUD
$2,859 USD
B+
Retailer 2
-
$4,195 AUD
$2,947 USD
View
Final sale: no returns
B+
Retailer 3
-
$4,268 AUD
$2,998 USD
View
B
Retailer 4
-
$4,544 AUD
$3,192 USD
View
B
Retailer 5
-
$4,544 AUD
$3,192 USD
View
B
Retailer 6
-
$4,646 AUD
CA$4,533 CAD
View
B
Retailer 7
-
$4,719 AUD
$3,315 USD
View
B+
Retailer 8
-
$4,938 AUD
$3,469 USD
View
B+
Retailer 9
-
$5,211 AUD
£2,882 GBP
View
B
Retailer 10
-
$5,245 AUD
$3,684 USD
View
B
Retailer 11
-
$5,395 AUD
€3,609 EUR
View
Retailer 12
-
$5,683 AUD
$3,992 USD
View
Price last confirmed 9 days ago
B
Retailer 13
-
$5,776 AUD
$4,057 USD
View
B
Retailer 14
-
$8,389 AUD
£4,640 GBP
View
Most Expensive
B
NZ Jewellers
433753fe-0b77-4813-a979-c272d9e7e061 · Oct 30
$8,739 AUD
$6,139 USD
View
14 more retailers have this diamond
Prices start from $4,070 AUDSave up to $4,669 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+
1.25ct Round
$4,070 AUD