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Marquise|Lab Grown|IGI

1.78ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754563659

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754563659

Diamond specifications and retailer prices

From €951 EUR
$1,062 USD
As of November 2, 2026
Save €3,650 EUR (79%) vs most expensive(unlock to see where)
34 retailers carry this diamond
Most expensive: €8,441 EUR at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 LG754563659 or 754563659. Listed at 34 retailers as of October 31, 2026, with a 384% 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
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754563659
Dimensions12.56 × 6.36 × 3.83 mm
L/W Ratio1.97
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
12.56 mm6.36 mm1.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754563659
Side View
Table 63.0%Crown 35.3°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 60.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €8,441 EUR|Low: €951 EUR|High: €8,441 EUR|Avg: €2,506 EUR
Do Amore Diamonds
Retailer 2
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Retailer 7
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Retailer 22
Retailer 23
November 2, 2026
Retailer 7€951 EUR
Retailer 10€1,034 EUR
Retailer 11€1,088 EUR
Retailer 16€1,097 EUR
Retailer 15€1,219 EUR
Retailer 3€1,258 EUR
Retailer 14€1,290 EUR
Retailer 23€1,383 EUR
Retailer 2€1,765 EUR
Retailer 8€1,837 EUR
Retailer 18€1,959 EUR
Retailer 22€2,018 EUR
Retailer 4€2,236 EUR
Retailer 19€2,237 EUR
Retailer 13€3,029 EUR
Retailer 21€3,129 EUR
Retailer 6€3,417 EUR
Retailer 5€3,495 EUR
Retailer 20€3,931 EUR
Retailer 17€4,211 EUR
Retailer 12€4,482 EUR
Retailer 9€4,601 EUR
Do Amore Diamonds€8,441 EUR

44 data points across 23 retailers

34 retailers€951 EUR to €4,601 EUR

A
Cheapest Retailer
-
€951 EUR
$1,062 USD
Retailer 2
-
€951 EUR
$1,062 USD
View
Price last confirmed 24 days ago
Retailer 3
-
€951 EUR
$1,062 USD
View
Price last confirmed 33 days ago
Retailer 4
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€1,034 EUR
$1,155 USD
View
Price last confirmed 34 days ago
Retailer 5
-
€1,088 EUR
$1,215 USD
View
Price last confirmed 34 days ago
A
Retailer 6
-
€1,097 EUR
$1,226 USD
View
Retailer 7
-
€1,103 EUR
$1,232 USD
View
Price last confirmed 29 days ago
Retailer 8
-
€1,103 EUR
$1,232 USD
View
Price last confirmed 22 days ago
A
Retailer 9
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€1,219 EUR
$1,362 USD
View
Final sale: no returns
A
Retailer 10
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€1,258 EUR
$1,405 USD
View
A
Retailer 11
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€1,290 EUR
$1,441 USD
View
Retailer 12
-
€1,383 EUR
£1,216 GBP
View
Price last confirmed 16 days ago
A
Retailer 13
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€1,547 EUR
HK$13,500 HKD
View
A
Retailer 14
-
€1,765 EUR
£1,553 GBP
View
B+
Retailer 15
-
€1,837 EUR
$2,052 USD
View
B+
Retailer 16
-
€1,959 EUR
View
B+
Retailer 17
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€2,018 EUR
$2,255 USD
View
B+
Retailer 18
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€2,236 EUR
$2,498 USD
View
B+
Retailer 19
-
€2,237 EUR
ZAR 40,374 ZAR
View
Retailer 20
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€2,281 EUR
$2,548 USD
View
Price last confirmed 22 days ago
B+
Retailer 21
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€2,281 EUR
$2,548 USD
View
Retailer 22
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€2,281 EUR
$2,548 USD
View
Price last confirmed 32 days ago
B+
Retailer 23
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€3,029 EUR
A$5,207 AUD
View
B
Retailer 24
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€3,129 EUR
$3,496 USD
View
Retailer 25
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€3,155 EUR
$3,524 USD
View
Price last confirmed 9 days ago
B
Retailer 26
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€3,356 EUR
£2,952 GBP
View
B
Retailer 27
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€3,417 EUR
$3,818 USD
View
B
Retailer 28
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€3,495 EUR
$3,904 USD
View
B
Retailer 29
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€3,931 EUR
£3,458 GBP
View
B
Retailer 30
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€4,211 EUR
A$7,238 AUD
View
B
Retailer 31
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€4,322 EUR
$4,829 USD
View
B
Retailer 32
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€4,482 EUR
SGD 6,767 SGD
View
B
Retailer 33
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€4,601 EUR
$5,140 USD
View
Most Expensive
Do Amore Diamonds
27-5CCC7A6A6 · Nov 2
€8,441 EUR
$9,430 USD
View
Price under review
33 more retailers have this diamond
Prices start from €951 EURSave up to €3,650 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
€951 EUR