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1.51ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG487172905

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487172905

Diamond specifications and retailer prices

From €749 EUR
$840 USD
As of November 2, 2026
Save €3,155 EUR (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €3,904 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG487172905 or 487172905. Listed at 11 retailers as of October 29, 2026, with prices from €749 to €3,904, a €3,155 spread on the same certified stone. MOH London lists it at €3,904. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487172905
Dimensions7.45 × 7.43 × 4.47 mm
L/W Ratio1.00
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
7.45 mm7.43 mm1.51 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487172905
Side View
Table 61.5%Crown 32.1°Girdle: MediumPavilion 41.4°Culet: NoneDepth 60.1%

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 2
Current: €3,904 EUR|Low: €749 EUR|High: €3,935 EUR|Avg: €1,761 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2€749 EUR
Retailer 3€1,042 EUR
Retailer 6€1,167 EUR
Retailer 4€1,209 EUR
Retailer 10€1,316 EUR
Retailer 7€1,364 EUR
Retailer 9€1,717 EUR
Retailer 5€1,920 EUR
Retailer 8€2,381 EUR
MOH London€3,904 EUR

13 data points across 10 retailers

11 retailers€749 EUR to €3,904 EUR

A
Cheapest Retailer
-
€749 EUR
$840 USD
B+
Retailer 2
-
€1,042 EUR
$1,169 USD
View
B+
Retailer 3
-
€1,133 EUR
$1,271 USD
View
B+
Retailer 4
-
€1,167 EUR
$1,309 USD
View
Final sale: no returns
B+
Retailer 5
-
€1,209 EUR
$1,356 USD
View
Retailer 6
-
€1,209 EUR
$1,356 USD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
€1,364 EUR
$1,530 USD
View
B
Retailer 8
-
€1,920 EUR
$2,153 USD
View
B
Retailer 9
-
€2,266 EUR
$2,541 USD
View
B
Retailer 10
-
€2,381 EUR
$2,671 USD
View
Most Expensive
B
MOH London
LG487172905 · Oct 29
€3,904 EUR
£3,448 GBP
View
10 more retailers have this diamond
Prices start from €749 EURSave up to €3,155 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
€749 EUR