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Marquise|Lab Grown|IGI

1.78ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG780664014

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664014

Diamond specifications and retailer prices

From €1,638 EUR
$1,830 USD
As of October 31, 2026
Save €4,485 EUR (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €8,972 EUR at With Clarity · As of October 31, 2026
View at With Clarity

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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780664014 or 780664014. Listed at 15 retailers as of October 31, 2026, with a 274% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
E
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780664014
Dimensions12.38 × 6.33 × 4.01 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
12.38 mm6.33 mm1.78 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780664014
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 63.3%

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 31
Current: €3,360 EUR|Low: €1,874 EUR|High: €5,050 EUR|Avg: €3,299 EUR|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 2€1,874 EUR
Retailer 8€2,220 EUR
Retailer 4€2,473 EUR
Retailer 9€2,633 EUR
Retailer 6€2,779 EUR
Retailer 5€3,208 EUR
Retailer 10€3,357 EUR
Retailer 1€3,360 EUR
Retailer 3€4,557 EUR
Retailer 11€4,702 EUR
Retailer 7€5,010 EUR

41 data points across 11 retailers

15 retailers€1,638 EUR to €6,123 EUR

A
Cheapest Retailer
-
€1,638 EUR
$1,830 USD
A
Retailer 2
-
€1,874 EUR
$2,094 USD
View
B+
Retailer 3
-
€2,131 EUR
HK$18,600 HKD
View
B+
Retailer 4
-
€2,220 EUR
$2,480 USD
View
B+
Retailer 5
-
€2,473 EUR
£2,176 GBP
View
B+
Retailer 6
-
€2,633 EUR
$2,942 USD
View
B+
Retailer 7
-
€2,779 EUR
View
B+
Retailer 8
-
€3,208 EUR
ZAR 57,894 ZAR
View
B
Retailer 9
-
€3,357 EUR
$3,750 USD
View
B+
Retailer 10
-
€3,360 EUR
A$5,775 AUD
View
Retailer 11
-
€4,557 EUR
$5,091 USD
View
Price last confirmed 8 days ago
B
Retailer 12
-
€4,702 EUR
$5,253 USD
View
B
Retailer 13
-
€5,010 EUR
£4,407 GBP
View
B
Retailer 14
-
€6,123 EUR
$6,841 USD
View
Most Expensive
With Clarity
780664014 · Oct 31
€8,972 EUR
$10,024 USD
View
Price under review
14 more retailers have this diamond
Prices start from €1,638 EURSave up to €4,485 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
€1,638 EUR