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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 €309 EUR
£272 GBP
As of October 30, 2026
Save €1,168 EUR (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,477 EUR at Brilliant Earth · As of October 31, 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 October 30, 2026, with prices from €309 to €1,477, a €1,168 spread on the same certified stone. Brilliant Earth lists it at €1,477. 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
Color
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: Oct 30
Current: €1,477 EUR|Low: €308 EUR|High: €1,951 EUR|Avg: €776 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
October 31, 2026
Retailer 5€309 EUR
Retailer 4€445 EUR
Retailer 6€453 EUR
Retailer 8€473 EUR
Retailer 2€495 EUR
Retailer 10€572 EUR
Retailer 7€615 EUR
Retailer 12€850 EUR
Retailer 3€894 EUR
Retailer 9€1,063 EUR
Retailer 11€1,073 EUR
Brilliant Earth€1,477 EUR

14 data points across 12 retailers

12 retailers€309 EUR to €1,477 EUR

A
Cheapest Retailer
-
€309 EUR
£272 GBP
B+
Retailer 2
-
€445 EUR
$497 USD
View
A
Retailer 3
-
€453 EUR
ZAR 8,178 ZAR
View
A
Retailer 4
-
€473 EUR
View
A
Retailer 5
-
€495 EUR
£435 GBP
View
A
Retailer 6
-
€572 EUR
$639 USD
View
A
Retailer 7
-
€615 EUR
A$1,057 AUD
View
B+
Retailer 8
-
€850 EUR
$950 USD
View
B+
Retailer 9
-
€894 EUR
$999 USD
View
B+
Retailer 10
-
€1,063 EUR
£935 GBP
View
B+
Retailer 11
-
€1,073 EUR
$1,199 USD
View
Most Expensive
B
Brilliant Earth
22163644A · Oct 31
€1,477 EUR
$1,650 USD
View
11 more retailers have this diamond
Prices start from €309 EURSave up to €1,168 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
€309 EUR