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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG478109508

Shape and cutting style on the report: Round brilliant

Certificate IGI LG478109508

Diamond specifications and retailer prices

From €177 EUR
As of November 1, 2026
Save €531 EUR (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,032 EUR 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478109508 or 478109508. Listed at 15 retailers as of November 1, 2026, with a 299% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478109508
Dimensions7.53 × 7.49 × 4.38 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
7.53 mm7.49 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478109508
Side View
Table 59.0%Crown 32.7°Girdle: MediumPavilion 40.1°Culet: NoneDepth 58.2%

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: Nov 1
Current: €1,032 EUR|Low: €170 EUR|High: €2,536 EUR|Avg: €415 EUR|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 7€177 EUR
Retailer 10€199 EUR
Retailer 3€219 EUR
Retailer 9€219 EUR
Retailer 8€290 EUR
Retailer 2€367 EUR
Retailer 4€401 EUR
Retailer 11€448 EUR
Retailer 5€690 EUR
Retailer 6€708 EUR
MOH London€1,032 EUR

42 data points across 11 retailers

15 retailers€177 EUR to €708 EUR

A
Cheapest Retailer
-
€177 EUR
A
Retailer 2
-
€199 EUR
View
Final sale: no returns
A
Retailer 3
-
€206 EUR
View
Retailer 4
-
€219 EUR
View
Price last confirmed 12 days ago
A
Retailer 5
-
€219 EUR
View
A
Retailer 6
-
€250 EUR
View
B+
Retailer 7
-
€290 EUR
View
A
Retailer 8
-
€367 EUR
View
A
Retailer 9
-
€390 EUR
View
A
Retailer 10
-
€401 EUR
View
B+
Retailer 11
-
€448 EUR
View
B+
Retailer 12
-
€690 EUR
View
B+
Retailer 13
-
€706 EUR
View
B+
Retailer 14
-
€708 EUR
View
Most Expensive
MOH London
LG478109508 · Oct 29
€1,032 EUR
£912 GBP
View
Price last confirmed 8 days ago
14 more retailers have this diamond
Prices start from €177 EURSave up to €531 EUR

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
€177 EUR