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Round|Lab Grown|IGI

0.51ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG341864712

Shape and cutting style on the report: Round brilliant

Certificate IGI LG341864712

Diamond specifications and retailer prices

From $128 USD
As of October 29, 2026
Save $1,206 USD (90%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,334 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG341864712 or 341864712. Listed at 8 retailers as of October 29, 2026, with prices from $128 to $1,334, a $1,206 spread on the same certified stone. MOH London lists it at $1,334. 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

0.51
Carat
G
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG341864712
Dimensions5.09 × 5.14 × 3.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
The laboratory grown diamond described above is classified as Type IIa. Laserscribe on Girdle: "LAB GROWN LG 341864712"
Top View
5.09 mm5.14 mm0.51 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG341864712
Side View
Table 57.0%Crown 35.5°GirdlePavilion 41.1°Culet: NoneDepth 62.1%

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: $1,334 USD|Low: $128 USD|High: $1,342 USD|Avg: $427 USD|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 6$128 USD
Retailer 5$149 USD
Retailer 4$159 USD
Retailer 2$296 USD
Retailer 7$304 USD
Retailer 10$350 USD
Retailer 9$432 USD
Retailer 3$511 USD
Retailer 8$646 USD
MOH London$1,334 USD

19 data points across 10 retailers

8 retailers$128 USD to $1,334 USD

A
Cheapest Retailer
-
$128 USD
A
Retailer 2
-
$149 USD
View
A
Retailer 3
-
$159 USD
View
A
Retailer 4
-
$296 USD
€282 EUR
View
B+
Retailer 5
-
$304 USD
View
B+
Retailer 6
-
$350 USD
View
B+
Retailer 7
-
$511 USD
View
Most Expensive
B
MOH London
LG_341864712 · Oct 29
$1,334 USD
£1,050 GBP
View
7 more retailers have this diamond
Prices start from $128 USDSave up to $1,206 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
0.51ct Round
$128 USD