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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 €1,644 EUR
$1,830 USD
As of October 30, 2026
Save €4,502 EUR (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €9,006 EUR at With Clarity · As of October 30, 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 30, 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
Colour
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 30
Current: €2,483 EUR|Low: €1,881 EUR|High: €5,069 EUR|Avg: €3,314 EUR|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2€1,881 EUR
Retailer 7€2,228 EUR
Retailer 1€2,483 EUR
Retailer 9€2,643 EUR
Retailer 5€2,790 EUR
Retailer 4€3,220 EUR
Retailer 10€3,369 EUR
Retailer 8€3,411 EUR
Retailer 3€4,574 EUR
Retailer 11€4,720 EUR
Retailer 6€5,029 EUR

42 data points across 11 retailers

15 retailers€1,644 EUR to €6,146 EUR

A
Cheapest Retailer
-
€1,644 EUR
$1,830 USD
A
Retailer 2
-
€1,881 EUR
$2,094 USD
View
B+
Retailer 3
-
€2,139 EUR
HK$18,600 HKD
View
B+
Retailer 4
-
€2,228 EUR
$2,480 USD
View
B+
Retailer 5
-
€2,483 EUR
£2,176 GBP
View
B+
Retailer 6
-
€2,643 EUR
$2,942 USD
View
B+
Retailer 7
-
€2,790 EUR
View
B+
Retailer 8
-
€3,220 EUR
ZAR 57,894 ZAR
View
B
Retailer 9
-
€3,369 EUR
$3,750 USD
View
Retailer 10
-
€3,411 EUR
A$5,841 AUD
View
Price last confirmed 21 days ago
B
Retailer 11
-
€4,574 EUR
$5,091 USD
View
B
Retailer 12
-
€4,720 EUR
$5,253 USD
View
B
Retailer 13
-
€5,029 EUR
£4,407 GBP
View
B
Retailer 14
-
€6,146 EUR
$6,841 USD
View
Most Expensive
With Clarity
780664014 · Oct 30
€9,006 EUR
$10,024 USD
View
Price under review
14 more retailers have this diamond
Prices start from €1,644 EURSave up to €4,502 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
€1,644 EUR