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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 $1,098 NZD
As of November 5, 2026
Save $4,792 NZD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,890 NZD at MOH London · As of November 5, 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 November 5, 2026, with prices from $1,098 to $5,890, a $4,792 spread on the same certified stone. MOH London lists it at $5,890. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $5,890 NZD|Low: $1,053 NZD|High: $5,985 NZD|Avg: $2,425 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 5$1,098 NZD
Retailer 8$1,227 NZD
Retailer 2$1,334 NZD
Retailer 6$1,361 NZD
Retailer 3$1,592 NZD
Retailer 7$2,083 NZD
Retailer 9$2,149 NZD
Retailer 4$3,376 NZD
Retailer 10$3,641 NZD
MOH London$5,890 NZD

21 data points across 10 retailers

11 retailers$1,098 NZD to $5,890 NZD

A
Cheapest Retailer
-
$1,098 NZD
B+
Retailer 2
-
$1,227 NZD
View
Final sale: no returns
B+
Retailer 3
-
$1,229 NZD
View
B+
Retailer 4
-
$1,334 NZD
View
B+
Retailer 5
-
$1,361 NZD
View
Retailer 6
-
$1,361 NZD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
$1,592 NZD
View
B
Retailer 8
-
$2,083 NZD
View
B
Retailer 9
-
$3,376 NZD
View
B
Retailer 10
-
$3,577 NZD
View
Most Expensive
B
MOH London
LG451056225 · Nov 5
$5,890 NZD
£2,607 GBP
View
10 more retailers have this diamond
Prices start from $1,098 NZDSave up to $4,792 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.

A
1.30ct Round
$1,098 NZD