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Marquise|Lab Grown|IGI

1.78ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG818655859

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818655859

Diamond specifications and retailer prices

From €1,480 EUR
$1,653 USD
As of November 2, 2026
Save €4,732 EUR (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €6,212 EUR at With Clarity · As of November 2, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818655859 or 818655859. Listed at 14 retailers as of November 2, 2026, with prices from €1,480 to €6,212, a €4,732 spread on the same certified stone. With Clarity lists it at €6,212. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818655859
Dimensions12.21 × 6.24 × 4.04 mm
L/W Ratio1.96
Girdle conditionFaceted
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
12.21 mm6.24 mm1.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818655859
Side View
Table 58.0%Crown 37°Girdle: Slightly ThickPavilion 40°Culet: NoneDepth 64.7%

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: €1,765 EUR|Low: €1,479 EUR|High: €6,088 EUR|Avg: €2,954 EUR|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
November 2, 2026
Retailer 2€1,480 EUR
Retailer 3€1,489 EUR
Retailer 1€1,765 EUR
Retailer 11€1,837 EUR
Retailer 7€1,959 EUR
Retailer 10€2,175 EUR
Retailer 8€2,237 EUR
Retailer 12€3,523 EUR
Retailer 6€3,759 EUR
Retailer 9€3,915 EUR
Retailer 5€4,205 EUR
Retailer 4€4,262 EUR
With Clarity€6,088 EUR

43 data points across 13 retailers

14 retailers€1,480 EUR to €6,212 EUR

A
Cheapest Retailer
-
€1,480 EUR
$1,653 USD
A
Retailer 2
-
€1,489 EUR
HK$13,000 HKD
View
A
Retailer 3
-
€1,593 EUR
$1,780 USD
View
A
Retailer 4
-
€1,765 EUR
£1,553 GBP
View
B+
Retailer 5
-
€1,837 EUR
$2,052 USD
View
B+
Retailer 6
-
€1,959 EUR
View
B+
Retailer 7
-
€2,175 EUR
$2,430 USD
View
B+
Retailer 8
-
€2,237 EUR
ZAR 40,374 ZAR
View
B+
Retailer 9
-
€3,523 EUR
$3,936 USD
View
B+
Retailer 10
-
€3,759 EUR
$4,200 USD
View
B+
Retailer 11
-
€3,915 EUR
£3,444 GBP
View
B
Retailer 12
-
€4,205 EUR
A$7,227 AUD
View
B
Retailer 13
-
€4,262 EUR
$4,761 USD
View
Most Expensive
B
With Clarity
818655859 · Nov 2
€6,212 EUR
$6,940 USD
View
13 more retailers have this diamond
Prices start from €1,480 EURSave up to €4,732 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
€1,480 EUR