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Round|Lab Grown|IGI

1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG631466945

Shape and cutting style on the report: Round brilliant

Certificate IGI LG631466945

Diamond specifications and retailer prices

From $196 USD
As of October 29, 2026
Save $948 USD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,144 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG631466945 or 631466945. Listed at 13 retailers as of October 29, 2026, with prices from $196 to $1,144, a $948 spread on the same certified stone. MOH London lists it at $1,144. 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

1.51
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG631466945
Dimensions7.46 × 7.40 × 4.44 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.46 mm7.40 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG631466945
Side View
Table 58.0%Crown 33.5°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 59.8%

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 29
Current: $1,144 USD|Low: $196 USD|High: $1,144 USD|Avg: $526 USD|+3.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 3$196 USD
Retailer 12$228 USD
Retailer 11$243 USD
Retailer 4$247 USD
Retailer 7$424 USD
Retailer 5$435 USD
Retailer 2$440 USD
Retailer 6$576 USD
Retailer 9$720 USD
Retailer 10$783 USD
Retailer 8$785 USD
MOH London$1,144 USD

45 data points across 12 retailers

13 retailers$196 USD to $1,144 USD

A
Cheapest Retailer
-
$196 USD
A
Retailer 2
-
$228 USD
View
A
Retailer 3
-
$243 USD
View
A
Retailer 4
-
$247 USD
View
Final sale: no returns
A
Retailer 5
-
$274 USD
View
B+
Retailer 6
-
$424 USD
View
A
Retailer 7
-
$435 USD
£342 GBP
View
A
Retailer 8
-
$440 USD
£347 GBP
View
B+
Retailer 9
-
$576 USD
View
B+
Retailer 10
-
$720 USD
View
B+
Retailer 11
-
$783 USD
View
B+
Retailer 12
-
$785 USD
View
Most Expensive
B
MOH London
LG631466945 · Oct 29
$1,144 USD
£901 GBP
View
12 more retailers have this diamond
Prices start from $196 USDSave up to $948 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
1.51ct Round
$196 USD