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Round|Lab Grown|IGI

0.51ct D SI2 Round Lab Grown Diamond

ID • D/SI2 • IGI LG677571662

Shape and cutting style on the report: Round brilliant

Certificate IGI LG677571662

Diamond specifications and retailer prices

From $137 USD
As of November 1, 2026
Save $1,148 USD (89%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,285 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG677571662 or 677571662. Listed at 13 retailers as of October 29, 2026, with prices from $137 to $1,285, a $1,148 spread on the same certified stone. MOH London lists it at $1,285. 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
D
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677571662
Dimensions5.10 × 5.15 × 3.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
5.10 mm5.15 mm0.51 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677571662
Side View
Table 59.0%Crown 35.4°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

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 1
Current: $1,285 USD|Low: $123 USD|High: $1,285 USD|Avg: $335 USD|+1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 29, 2026
Retailer 3$124 USD
Retailer 8$137 USD
Retailer 10$143 USD
Retailer 9$163 USD
Retailer 14$163 USD
Retailer 11$210 USD
Retailer 5$250 USD
Retailer 2$284 USD
Retailer 13$295 USD
Retailer 7$306 USD
Retailer 6$325 USD
Retailer 12$381 USD
Retailer 4$492 USD
Retailer 15$549 USD
MOH London$1,285 USD

22 data points across 15 retailers

13 retailers$137 USD to $1,285 USD

Retailer 1
-
$124 USD
Price last confirmed 10 days ago
A
Retailer 2
-
$137 USD
View
Final sale: no returns
A
Retailer 3
-
$143 USD
View
A
Retailer 4
-
$163 USD
View
Retailer 5
-
$163 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$210 USD
View
Retailer 7
-
$250 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$284 USD
€270 EUR
View
B+
Retailer 9
-
$295 USD
View
B+
Retailer 10
-
$381 USD
View
Retailer 11
-
$492 USD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$549 USD
View
Most Expensive
B
MOH London
LG677571662 · Oct 29
$1,285 USD
£1,012 GBP
View
12 more retailers have this diamond
Prices start from $137 USDSave up to $1,148 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
$137 USD