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Round|Lab Grown|IGI

1.30ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451056225

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056225

Diamond specifications and retailer prices

From $617 USD
As of October 29, 2026
Save $2,708 USD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,325 USD at MOH London · As of October 25, 2026
View at MOH London

About this 1.3ct lab-grown round diamond

This 1.3ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056225 or 451056225. Listed at 11 retailers as of October 25, 2026, with prices from $617 to $3,325, a $2,708 spread on the same certified stone. MOH London lists it at $3,325. 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

1.30
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056225
Dimensions6.96 × 7.01 × 4.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.96 mm7.01 mm1.30 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056225
Side View
Table 59.0%Crown 36.4°Girdle: THN-MEDPavilion 41.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
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 29
Current: $3,325 USD|Low: $592 USD|High: $3,364 USD|Avg: $1,353 USD|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 5$617 USD
Retailer 8$690 USD
Retailer 2$750 USD
Retailer 6$765 USD
Retailer 3$895 USD
Retailer 7$1,171 USD
Retailer 9$1,208 USD
Retailer 4$1,898 USD
Retailer 10$2,047 USD
MOH London$3,325 USD

21 data points across 10 retailers

11 retailers$617 USD to $3,325 USD

A
Cheapest Retailer
-
$617 USD
A
Retailer 2
-
$690 USD
View
Final sale: no returns
B+
Retailer 3
-
$691 USD
View
B+
Retailer 4
-
$750 USD
View
B+
Retailer 5
-
$765 USD
View
Retailer 6
-
$765 USD
View
Price last confirmed 15 days ago
B+
Retailer 7
-
$895 USD
View
B
Retailer 8
-
$1,171 USD
View
B
Retailer 9
-
$1,898 USD
View
B
Retailer 10
-
$2,011 USD
View
Most Expensive
B
MOH London
LG451056225 · Oct 25
$3,325 USD
£2,618 GBP
View
10 more retailers have this diamond
Prices start from $617 USDSave up to $2,708 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
1.30ct Round
$617 USD