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Marquise|Lab Grown|IGI

1.78ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG780664167

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664167

Diamond specifications and retailer prices

From €1,396 EUR
$1,560 USD
As of November 1, 2026
Save €4,816 EUR (78%) vs most expensive(unlock to see where)
15 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 LG780664167 or 780664167. Listed at 15 retailers as of November 1, 2026, with prices from €1,396 to €6,212, a €4,816 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780664167
Dimensions12.28 × 6.30 × 4.02 mm
L/W Ratio1.95
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
12.28 mm6.30 mm1.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780664167
Side View
Table 59.0%Crown 35.9°Girdle: Slightly ThickPavilion 40°Culet: NoneDepth 63.8%

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 1
Current: €1,765 EUR|Low: €1,396 EUR|High: €4,269 EUR|Avg: €2,615 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
November 2, 2026
Retailer 2€1,396 EUR
Retailer 3€1,480 EUR
Retailer 1€1,765 EUR
Retailer 11€1,837 EUR
Retailer 7€1,959 EUR
Retailer 9€2,175 EUR
Retailer 8€2,237 EUR
Retailer 4€3,155 EUR
Retailer 12€3,523 EUR
Retailer 6€3,759 EUR
Retailer 5€3,909 EUR
Retailer 10€4,262 EUR

42 data points across 12 retailers

15 retailers€1,396 EUR to €6,212 EUR

A
Cheapest Retailer
-
€1,396 EUR
$1,560 USD
A
Retailer 2
-
€1,480 EUR
$1,653 USD
View
A
Retailer 3
-
€1,489 EUR
HK$13,000 HKD
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
Retailer 9
-
€3,155 EUR
$3,524 USD
View
Price last confirmed 9 days ago
B
Retailer 10
-
€3,523 EUR
$3,936 USD
View
B
Retailer 11
-
€3,759 EUR
$4,200 USD
View
B
Retailer 12
-
€3,909 EUR
£3,439 GBP
View
B
Retailer 13
-
€4,262 EUR
$4,761 USD
View
Retailer 14
-
€4,262 EUR
A$7,326 AUD
View
Price last confirmed 24 days ago
Most Expensive
B
With Clarity
780664167 · Nov 2
€6,212 EUR
$6,940 USD
View
14 more retailers have this diamond
Prices start from €1,396 EURSave up to €4,816 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
€1,396 EUR