Round|Natural|GIA

1.25ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6401599815

Certificate GIA 6401599815

Diamond specifications and retailer prices

From $1,981 USD
As of October 26, 2026
Save $1,881 USD (49%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,784 USD at NZ Jewellers · As of September 19, 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 6401599815. Listed at 17 retailers as of October 26, 2026, with a 95% 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

1.25
Carat
J
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6401599815
Dimensions6.86 × 6.83 × 4.32 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.86 mm6.83 mm1.25 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6401599815
Side View
Table 57.0%Crown 35°Girdle: ThickPavilion 41.4°Culet: NoneDepth 63.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: $2,387 USD|Low: $1,862 USD|High: $4,014 USD|Avg: $2,368 USD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 27, 2026
Retailer 11$1,981 USD
Retailer 2$1,988 USD
Retailer 6$2,025 USD
Retailer 9$2,032 USD
Retailer 12$2,099 USD
Retailer 8$2,202 USD
Retailer 3$2,288 USD
Retailer 10$2,341 USD
Retailer 1$2,387 USD
Retailer 4$2,620 USD
Retailer 5$2,737 USD
Retailer 7$3,862 USD

16 data points across 12 retailers

17 retailers$1,981 USD to $3,862 USD

A
Cheapest Retailer
-
$1,981 USD
A
Retailer 2
-
$1,988 USD
View
A
Retailer 3
-
$2,025 USD
View
A
Retailer 4
-
$2,099 USD
View
A
Retailer 5
-
$2,202 USD
View
Retailer 6
-
$2,202 USD
View
Price last confirmed 23 days ago
Retailer 7
-
$2,202 USD
View
Price last confirmed 19 days ago
A
Retailer 8
-
$2,303 USD
View
A
Retailer 9
-
$2,341 USD
View
A
Retailer 10
-
$2,387 USD
£1,880 GBP
View
Retailer 11
-
$2,540 USD
View
Price last confirmed 27 days ago
Retailer 12
-
$2,640 USD
View
Price last confirmed 39 days ago
B+
Retailer 13
-
$2,737 USD
€2,607 EUR
View
B
Retailer 14
-
$3,862 USD
£3,041 GBP
View
Retailer 15
-
$4,603 USD
View
Price last confirmed 28 days ago
Retailer 16
-
$4,603 USD
View
Price last confirmed 20 days ago
Most Expensive
NZ Jewellers
e3228737-f0b4-43d0-9321-c885df49815f · Sep 19
$4,784 USD
View
Price last confirmed 41 days ago
16 more retailers have this diamond
Prices start from $1,981 USDSave up to $1,881 USD

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.

A
1.25ct Round
$1,981 USD