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1.33ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG451056616

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056616

Diamond specifications and retailer prices

From $530 USD
As of November 5, 2026
Save $2,213 USD (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,743 USD at MOH London · As of November 3, 2026
View at MOH London

About this 1.33ct lab-grown round diamond

This 1.33ct 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 LG451056616 or 451056616. Listed at 10 retailers as of November 3, 2026, with prices from $530 to $2,743, a $2,213 spread on the same certified stone. MOH London lists it at $2,743. 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

1.33
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056616
Dimensions7.03 × 7.07 × 4.38 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.03 mm7.07 mm1.33 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056616
Side View
Table 57.0%Crown 32.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.1%

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: $2,743 USD|Low: $509 USD|High: $2,776 USD|Avg: $1,203 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 5$530 USD
Retailer 6$657 USD
Retailer 8$657 USD
Retailer 3$795 USD
Retailer 2$908 USD
Retailer 7$1,017 USD
Retailer 4$1,696 USD
MOH London$2,743 USD

38 data points across 8 retailers

10 retailers$530 USD to $2,743 USD

A
Cheapest Retailer
-
$530 USD
A
Retailer 2
-
$593 USD
View
Retailer 3
-
$657 USD
View
Price last confirmed 21 days ago
B+
Retailer 4
-
$657 USD
View
B+
Retailer 5
-
$795 USD
View
B+
Retailer 6
-
$908 USD
View
B+
Retailer 7
-
$1,017 USD
View
B
Retailer 8
-
$1,696 USD
View
B
Retailer 9
-
$1,728 USD
View
Most Expensive
B
MOH London
LG451056616 · Nov 3
$2,743 USD
£2,160 GBP
View
9 more retailers have this diamond
Prices start from $530 USDSave up to $2,213 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
1.33ct Round
$530 USD