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Marquise|Lab Grown|IGI

7.78ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG816633249

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG816633249

Diamond specifications and retailer prices

From €1,715 EUR
$1,923 USD
As of November 2, 2026
Save €6,831 EUR (80%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €8,546 EUR at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

About this 7.78ct lab-grown marquise diamond

This 7.78ct lab-grown marquise sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816633249 or 816633249. Listed at 6 retailers as of November 1, 2026, with prices from €1,715 to €8,546, a €6,831 spread on the same certified stone. Diamonds Direct lists it at €8,546. 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

7.78
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816633249
Dimensions20.44 × 10.45 × 6.38 mm
L/W Ratio1.96
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
20.44 mm10.45 mm7.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816633249
Side View
Table 61.0%Crown 34.2°Girdle: MED-STKPavilion 40°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €8,546 EUR|Low: €1,259 EUR|High: €8,546 EUR|Avg: €3,835 EUR|+22.2%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4€1,259 EUR
Retailer 6€1,715 EUR
Retailer 2€1,959 EUR
Retailer 5€3,544 EUR
Retailer 3€5,305 EUR
Diamonds Direct€8,546 EUR

46 data points across 6 retailers

6 retailers€1,715 EUR to €8,546 EUR

Retailer 1
-
€1,259 EUR
$1,412 USD
Price last confirmed 21 days ago
A
Retailer 2
-
€1,715 EUR
$1,923 USD
View
B+
Retailer 3
-
€1,959 EUR
£1,730 GBP
View
B
Retailer 4
-
€3,544 EUR
$3,975 USD
View
B
Retailer 5
-
€5,305 EUR
$5,950 USD
View
Most Expensive
B
Diamonds Direct
1046819 · Nov 1
€8,546 EUR
$9,585 USD
View
5 more retailers have this diamond
Prices start from €1,715 EURSave up to €6,831 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
7.78ct Marquise
€1,715 EUR