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Marquise|Lab Grown|IGI

3.51ct E FL Marquise Lab Grown Diamond

ID • E/FL • IGI LG717586084

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG717586084

Diamond specifications and retailer prices

From $7,004 USD
As of October 30, 2026
Save $20,710 USD (75%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $27,714 USD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 3.51ct lab-grown marquise diamond

This 3.51ct 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 LG717586084 or 717586084. Listed at 24 retailers as of October 30, 2026, with prices from $7,004 to $27,714, a $20,710 spread on the same certified stone. Taylor and Hart lists it at $27,714. 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

3.51
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG717586084
Dimensions15.17 × 7.77 × 5.08 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.17 mm7.77 mm3.51 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG717586084
Side View
Table 56.0%Crown 36.4°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 65.4%

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: $12,450 USD|Low: $7,004 USD|High: $29,404 USD|Avg: $11,422 USD|-7.0%
Retailer 1
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Retailer 20
Taylor and Hart
October 30, 2026
Retailer 7$7,004 USD
Retailer 5$7,274 USD
Retailer 2$7,284 USD
Retailer 11$7,499 USD
Retailer 19$7,635 USD
Retailer 4$8,085 USD
Retailer 6$8,125 USD
Retailer 9$8,125 USD
Retailer 20$8,787 USD
Retailer 8$9,645 USD
Retailer 18$9,846 USD
Retailer 13$9,892 USD
Retailer 14$10,193 USD
Retailer 10$11,628 USD
Retailer 17$12,028 USD
Retailer 1$12,450 USD
Retailer 16$13,126 USD
Retailer 3$14,832 USD
Retailer 15$16,039 USD
Retailer 12$18,866 USD
Taylor and Hart$27,714 USD

33 data points across 21 retailers

24 retailers$7,004 USD to $27,714 USD

A
Cheapest Retailer
-
$7,004 USD
B+
Retailer 2
-
$7,274 USD
View
A
Retailer 3
-
$7,284 USD
View
A
Retailer 4
-
$7,499 USD
View
A
Retailer 5
-
$7,635 USD
View
B+
Retailer 6
-
$8,085 USD
View
B+
Retailer 7
-
$8,125 USD
View
Retailer 8
-
$8,125 USD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
$8,787 USD
View
B+
Retailer 10
-
$9,645 USD
View
B+
Retailer 11
-
$9,846 USD
View
Final sale: no returns
Retailer 12
-
$9,892 USD
£7,789 GBP
View
Price last confirmed 29 days ago
B+
Retailer 13
-
$10,193 USD
£8,026 GBP
View
Retailer 14
-
$11,115 USD
View
Price last confirmed 31 days ago
B+
Retailer 15
-
$11,628 USD
£9,156 GBP
View
Retailer 16
-
$11,920 USD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$12,028 USD
View
B+
Retailer 18
-
$12,450 USD
View
B+
Retailer 19
-
$13,126 USD
€12,501 EUR
View
B+
Retailer 20
-
$13,762 USD
View
B+
Retailer 21
-
$14,832 USD
View
B
Retailer 22
-
$16,039 USD
£12,629 GBP
View
B
Retailer 23
-
$18,866 USD
ZAR 304,774 ZAR
View
Most Expensive
B
Taylor and Hart
HWQ20GM · Oct 30
$27,714 USD
View
23 more retailers have this diamond
Prices start from $7,004 USDSave up to $20,710 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
3.51ct Marquise
$7,004 USD