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Marquise|Lab Grown|IGI

2.58ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG788612900

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG788612900

Diamond specifications and retailer prices

From $3,861 USD
£3,040 GBP
As of October 29, 2026
1 retailer carries this diamond
Only listing: $3,861 USD at Diamond Quarter
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Diamond Quarter

About this 2.58ct lab-grown marquise diamond

This 2.58ct lab-grown marquise sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788612900 or 788612900. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

2.58
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788612900
Dimensions14.32 × 7.08 × 4.47 mm
L/W Ratio2.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.32 mm7.08 mm2.58 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788612900
Side View
Table 58.0%Crown 35.7°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 63.1%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 29
Current: $3,861 USD|Low: $591 USD|High: $4,120 USD|Avg: $2,045 USD
Diamond Quarter
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
May 22, 2026
Retailer 5$591 USD
Retailer 3$692 USD
Retailer 2$832 USD
Retailer 4$1,204 USD
Retailer 6$1,291 USD
Diamond Quarter$3,861 USD
Retailer 7$4,120 USD

20 data points across 7 retailers

1 retailer

C
Diamond Quarter
2.58SI1ELG2560B9N · Oct 29
$3,861 USD
£3,040 GBP
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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.

C
2.58ct Marquise
$3,861 USD