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Round|Lab Grown|IGI

1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686567

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686567

Diamond specifications and retailer prices

From $201 USD
As of October 29, 2026
Save $972 USD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,173 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 LG818686567 or 818686567. Listed at 15 retailers as of October 29, 2026, with prices from $201 to $1,173, a $972 spread on the same certified stone. MOH London lists it at $1,173. 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 angle34.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686567
Dimensions7.36 × 7.33 × 4.53 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.36 mm7.33 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686567
Side View
Table 57.0%Crown 34.2°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.7%

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: $1,173 USD|Low: $201 USD|High: $1,181 USD|Avg: $601 USD|-0.5%
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 9$201 USD
Retailer 11$250 USD
Retailer 2$416 USD
Retailer 12$433 USD
Retailer 7$446 USD
Retailer 4$456 USD
Retailer 5$457 USD
Retailer 6$644 USD
Retailer 8$715 USD
Retailer 3$856 USD
Retailer 10$860 USD
MOH London$1,173 USD

43 data points across 12 retailers

15 retailers$201 USD to $1,173 USD

A
Cheapest Retailer
-
$201 USD
A
Retailer 2
-
$233 USD
View
A
Retailer 3
-
$250 USD
View
A
Retailer 4
-
$250 USD
View
A
Retailer 5
-
$416 USD
€396 EUR
View
B+
Retailer 6
-
$433 USD
View
A
Retailer 7
-
$446 USD
£351 GBP
View
A
Retailer 8
-
$456 USD
View
A
Retailer 9
-
$457 USD
£360 GBP
View
B+
Retailer 10
-
$644 USD
View
B+
Retailer 11
-
$715 USD
View
B+
Retailer 12
-
$802 USD
View
B
Retailer 13
-
$856 USD
View
B
Retailer 14
-
$860 USD
View
Most Expensive
B
MOH London
LG818686567 · Oct 29
$1,173 USD
£924 GBP
View
14 more retailers have this diamond
Prices start from $201 USDSave up to $972 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
$201 USD