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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 $3,557 USD
As of October 30, 2026
Save $20,923 USD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $24,480 USD 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 $3,557 to $24,480, a $20,923 spread on the same certified stone. Do Amore Diamonds lists it at $24,480. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $24,480 USD|Low: $3,557 USD|High: $28,180 USD|Avg: $8,321 USD|-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
October 31, 2026
Retailer 10$3,557 USD
Retailer 11$3,731 USD
Retailer 8$3,890 USD
Retailer 6$3,907 USD
Retailer 13$4,280 USD
Retailer 7$4,814 USD
Retailer 2$5,580 USD
Retailer 3$5,692 USD
Retailer 5$6,459 USD
Retailer 4$7,360 USD
Retailer 12$7,805 USD
Retailer 9$8,590 USD
Retailer 14$9,809 USD
Retailer 15$11,307 USD
Do Amore Diamonds$24,480 USD

34 data points across 15 retailers

15 retailers$3,557 USD to $24,480 USD

A
Cheapest Retailer
-
$3,557 USD
A
Retailer 2
-
$3,731 USD
View
A
Retailer 3
-
$3,890 USD
View
A
Retailer 4
-
$3,907 USD
View
A
Retailer 5
-
$4,280 USD
View
A
Retailer 6
-
$4,814 USD
View
Final sale: no returns
A
Retailer 7
-
$5,580 USD
View
A
Retailer 8
-
$5,692 USD
View
B+
Retailer 9
-
$6,459 USD
View
B+
Retailer 10
-
$7,360 USD
View
B+
Retailer 11
-
$7,805 USD
€7,433 EUR
View
B+
Retailer 12
-
$8,590 USD
View
B+
Retailer 13
-
$9,809 USD
£7,724 GBP
View
B+
Retailer 14
-
$11,307 USD
View
Most Expensive
B
Do Amore Diamonds
27-2357479ED · Oct 31
$24,480 USD
View
14 more retailers have this diamond
Prices start from $3,557 USDSave up to $20,923 USD

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
$3,557 USD