CaratHunter
Plans
Marquise|Lab Grown|IGI

3.12ct D FL Marquise Lab Grown Diamond

ID • D/FL • IGI LG780662178

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780662178

Diamond specifications and retailer prices

From €3,184 EUR
$3,557 USD
As of October 30, 2026
Save €18,728 EUR (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €21,912 EUR at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown marquise diamond

This 3.12ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780662178 or 780662178. Listed at 15 retailers as of October 30, 2026, with prices from €3,184 to €21,912, a €18,728 spread on the same certified stone. Do Amore Diamonds lists it at €21,912. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.12
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780662178
Dimensions14.56 × 7.62 × 4.93 mm
L/W Ratio1.91
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
14.56 mm7.62 mm3.12 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780662178
Side View
Table 59.0%Crown 36.8°Girdle: MED-STKPavilion 41.1°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: Oct 30
Current: €21,912 EUR|Low: €3,184 EUR|High: €25,224 EUR|Avg: €7,423 EUR|-13.1%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 11€3,184 EUR
Retailer 12€3,340 EUR
Retailer 9€3,482 EUR
Retailer 6€3,497 EUR
Retailer 14€3,831 EUR
Retailer 7€4,309 EUR
Retailer 8€4,995 EUR
Retailer 4€5,095 EUR
Retailer 2€5,728 EUR
Retailer 5€6,588 EUR
Retailer 13€6,986 EUR
Retailer 10€7,689 EUR
Retailer 15€8,780 EUR
Retailer 3€10,121 EUR
Do Amore Diamonds€21,912 EUR

35 data points across 15 retailers

15 retailers€3,184 EUR to €21,912 EUR

A
Cheapest Retailer
-
€3,184 EUR
$3,557 USD
A
Retailer 2
-
€3,340 EUR
$3,731 USD
View
A
Retailer 3
-
€3,482 EUR
$3,890 USD
View
A
Retailer 4
-
€3,497 EUR
$3,907 USD
View
A
Retailer 5
-
€3,831 EUR
$4,280 USD
View
A
Retailer 6
-
€4,309 EUR
$4,814 USD
View
Final sale: no returns
A
Retailer 7
-
€4,995 EUR
$5,580 USD
View
A
Retailer 8
-
€5,095 EUR
$5,692 USD
View
B+
Retailer 9
-
€5,728 EUR
$6,399 USD
View
B+
Retailer 10
-
€6,588 EUR
$7,360 USD
View
B+
Retailer 11
-
€6,986 EUR
View
B+
Retailer 12
-
€7,689 EUR
$8,590 USD
View
B+
Retailer 13
-
€8,780 EUR
£7,724 GBP
View
B+
Retailer 14
-
€10,121 EUR
$11,307 USD
View
Most Expensive
B
Do Amore Diamonds
27-2357479ED · Oct 31
€21,912 EUR
$24,480 USD
View
14 more retailers have this diamond
Prices start from €3,184 EURSave up to €18,728 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
3.12ct Marquise
€3,184 EUR