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1.35ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG451057295

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057295

Diamond specifications and retailer prices

From $537 USD
As of November 5, 2026
Save $2,246 USD (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,783 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.35ct lab-grown round diamond

This 1.35ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057295 or 451057295. Listed at 10 retailers as of November 1, 2026, with prices from $537 to $2,783, a $2,246 spread on the same certified stone. MOH London lists it at $2,783. 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

1.35
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057295
Dimensions7.04 × 7.06 × 4.41 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.04 mm7.06 mm1.35 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057295
Side View
Table 59.5%Crown 35.4°Girdle: MED-STKPavilion 41.5°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: Nov 5
Current: $2,783 USD|Low: $516 USD|High: $2,816 USD|Avg: $1,240 USD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5$537 USD
Retailer 6$666 USD
Retailer 8$666 USD
Retailer 3$800 USD
Retailer 2$921 USD
Retailer 7$1,031 USD
Retailer 4$1,720 USD
Retailer 9$1,785 USD
MOH London$2,783 USD

38 data points across 9 retailers

10 retailers$537 USD to $2,783 USD

A
Cheapest Retailer
-
$537 USD
A
Retailer 2
-
$602 USD
View
Retailer 3
-
$666 USD
View
Price last confirmed 21 days ago
B+
Retailer 4
-
$666 USD
View
B+
Retailer 5
-
$800 USD
View
B+
Retailer 6
-
$921 USD
View
B+
Retailer 7
-
$1,031 USD
View
B
Retailer 8
-
$1,720 USD
View
B
Retailer 9
-
$1,753 USD
View
Most Expensive
B
MOH London
LG451057295 · Nov 1
$2,783 USD
£2,191 GBP
View
9 more retailers have this diamond
Prices start from $537 USDSave up to $2,246 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
1.35ct Round
$537 USD