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Marquise|Lab Grown|IGI

4.51ct G SI1 Marquise Lab Grown Diamond

ID • G/SI1 • IGI LG597355707

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG597355707

Diamond specifications and retailer prices

From €459 EUR
$513 USD
As of October 27, 2026
Save €3,613 EUR (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €4,073 EUR at Do Amore Diamonds · As of October 28, 2026
View at Do Amore Diamonds

About this 4.51ct lab-grown marquise diamond

This 4.51ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG597355707 or 597355707. Listed at 12 retailers as of October 27, 2026, with prices from €459 to €4,073, a €3,613 spread on the same certified stone. Do Amore Diamonds lists it at €4,073. 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

4.51
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG597355707
Dimensions17.61 × 8.69 × 5.31 mm
L/W Ratio2.03
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
17.61 mm8.69 mm4.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG597355707
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.1%

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 27
Current: €4,073 EUR|Low: €380 EUR|High: €4,610 EUR|Avg: €1,673 EUR|-11.7%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 28, 2026
Retailer 11€459 EUR
Retailer 9€514 EUR
Retailer 10€520 EUR
Retailer 6€596 EUR
Retailer 7€883 EUR
Retailer 2€886 EUR
Retailer 12€1,468 EUR
Retailer 13€1,651 EUR
Retailer 5€1,893 EUR
Retailer 3€2,077 EUR
Retailer 4€2,646 EUR
Retailer 8€2,731 EUR
Do Amore Diamonds€4,073 EUR

24 data points across 13 retailers

12 retailers€459 EUR to €4,073 EUR

A
Cheapest Retailer
-
€459 EUR
$513 USD
Retailer 2
-
€514 EUR
$574 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
€596 EUR
£524 GBP
View
B+
Retailer 4
-
€883 EUR
$986 USD
View
A
Retailer 5
-
€886 EUR
$990 USD
View
Price last confirmed 5 days ago
B+
Retailer 6
-
€1,468 EUR
$1,640 USD
View
Retailer 7
-
€1,651 EUR
$1,845 USD
View
Price last confirmed 7 days ago
B
Retailer 8
-
€2,077 EUR
$2,320 USD
View
B
Retailer 9
-
€2,646 EUR
$2,956 USD
View
B
Retailer 10
-
€2,731 EUR
£2,402 GBP
View
B
Retailer 11
-
€3,804 EUR
$4,250 USD
View
Most Expensive
B
Do Amore Diamonds
27-1B2B974D9 · Oct 28
€4,073 EUR
$4,550 USD
View
11 more retailers have this diamond
Prices start from €459 EURSave up to €3,613 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
4.51ct Marquise
€459 EUR