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Marquise|Lab Grown|IGI

1.78ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG836666661

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG836666661

Diamond specifications and retailer prices

From €307 EUR
£271 GBP
As of November 2, 2026
Save €1,164 EUR (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,471 EUR at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG836666661 or 836666661. Listed at 12 retailers as of November 2, 2026, with prices from €307 to €1,471, a €1,164 spread on the same certified stone. Brilliant Earth lists it at €1,471. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836666661
Dimensions11.86 × 6.55 × 4.04 mm
L/W Ratio1.81
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.86 mm6.55 mm1.78 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836666661
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.7%

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: €1,471 EUR|Low: €307 EUR|High: €1,944 EUR|Avg: €763 EUR|-24.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 6€307 EUR
Retailer 4€443 EUR
Retailer 7€454 EUR
Retailer 9€471 EUR
Retailer 2€497 EUR
Retailer 10€570 EUR
Retailer 5€614 EUR
Retailer 12€847 EUR
Retailer 3€891 EUR
Retailer 8€1,053 EUR
Retailer 11€1,069 EUR
Brilliant Earth€1,471 EUR

17 data points across 12 retailers

12 retailers€307 EUR to €1,471 EUR

A
Cheapest Retailer
-
€307 EUR
£271 GBP
B+
Retailer 2
-
€443 EUR
$497 USD
View
A
Retailer 3
-
€454 EUR
ZAR 8,218 ZAR
View
A
Retailer 4
-
€471 EUR
View
A
Retailer 5
-
€497 EUR
£439 GBP
View
A
Retailer 6
-
€570 EUR
$639 USD
View
A
Retailer 7
-
€614 EUR
A$1,059 AUD
View
B+
Retailer 8
-
€847 EUR
$950 USD
View
B+
Retailer 9
-
€891 EUR
$999 USD
View
B+
Retailer 10
-
€1,053 EUR
£930 GBP
View
B+
Retailer 11
-
€1,069 EUR
$1,199 USD
View
Most Expensive
B
Brilliant Earth
22163644A · Nov 2
€1,471 EUR
$1,650 USD
View
11 more retailers have this diamond
Prices start from €307 EURSave up to €1,164 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
1.78ct Marquise
€307 EUR