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Marquise|Lab Grown|IGI

3.00ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG780663620

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780663620

Diamond specifications and retailer prices

From $3,315 USD
As of October 30, 2026
Save $17,030 USD (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $20,345 USD at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 3ct lab-grown marquise diamond

This 3ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780663620 or 780663620. Listed at 13 retailers as of October 29, 2026, with prices from $3,315 to $20,345, a $17,030 spread on the same certified stone. Blue Nile lists it at $20,345. 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

3.00
Carat
E
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780663620
Dimensions14.54 × 7.49 × 4.73 mm
L/W Ratio1.94
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
14.54 mm7.49 mm3.00 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780663620
Side View
Table 59.0%Crown 36.7°Girdle: STK-THKPavilion 39.7°Culet: NoneDepth 63.2%

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: $20,345 USD|Low: $3,315 USD|High: $22,486 USD|Avg: $9,386 USD|-9.5%
Blue Nile
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
October 29, 2026
Retailer 10$3,315 USD
Retailer 6$3,433 USD
Retailer 12$4,074 USD
Retailer 7$6,127 USD
Retailer 11$7,160 USD
Retailer 14$7,175 USD
Retailer 8$7,649 USD
Retailer 9$10,076 USD
Retailer 3$10,716 USD
Retailer 5$10,840 USD
Retailer 2$10,863 USD
Retailer 13$12,540 USD
Retailer 4$16,610 USD
Blue Nile$20,345 USD

39 data points across 14 retailers

13 retailers$3,315 USD to $20,345 USD

A
Cheapest Retailer
-
$3,315 USD
A
Retailer 2
-
$4,074 USD
View
B+
Retailer 3
-
$6,127 USD
£4,825 GBP
View
B+
Retailer 4
-
$7,160 USD
View
B+
Retailer 5
-
$7,175 USD
View
B+
Retailer 6
-
$7,649 USD
€7,285 EUR
View
B+
Retailer 7
-
$10,076 USD
£7,934 GBP
View
B
Retailer 8
-
$10,716 USD
View
B
Retailer 9
-
$10,840 USD
View
B
Retailer 10
-
$10,863 USD
ZAR 175,491 ZAR
View
B
Retailer 11
-
$12,540 USD
View
B
Retailer 12
-
$16,610 USD
View
Most Expensive
B
Blue Nile
29977966 · Oct 29
$20,345 USD
View
12 more retailers have this diamond
Prices start from $3,315 USDSave up to $17,030 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
3.00ct Marquise
$3,315 USD