CaratHunter
Plans
Marquise|Lab Grown|IGI

3.51ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG717540398

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG717540398

Diamond specifications and retailer prices

From €4,644 EUR
$5,188 USD
As of October 30, 2026
Save €14,615 EUR (76%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: €19,259 EUR at Taylor and Hart · As of October 31, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG717540398 or 717540398. Listed at 26 retailers as of October 30, 2026, with prices from €4,644 to €19,259, a €14,615 spread on the same certified stone. Taylor and Hart lists it at €19,259. 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
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG717540398
Dimensions15.19 × 7.82 × 5.07 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.19 mm7.82 mm3.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG717540398
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 64.8%

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: €6,409 EUR|Low: €4,644 EUR|High: €19,259 EUR|Avg: €8,611 EUR|-5.7%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Taylor and Hart
November 1, 2026
Retailer 9€4,644 EUR
Retailer 7€4,924 EUR
Retailer 8€5,387 EUR
Retailer 5€5,402 EUR
Retailer 2€6,169 EUR
Retailer 4€6,190 EUR
Retailer 10€6,395 EUR
Retailer 1€6,409 EUR
Retailer 3€6,458 EUR
Retailer 15€6,877 EUR
Retailer 11€7,639 EUR
Retailer 17€7,899 EUR
Retailer 16€8,633 EUR
Retailer 6€10,144 EUR
Retailer 18€10,975 EUR
Retailer 13€11,654 EUR
Retailer 14€12,506 EUR
Retailer 19€12,507 EUR
Retailer 12€17,817 EUR
Taylor and Hart€19,259 EUR

29 data points across 20 retailers

26 retailers€4,644 EUR to €19,259 EUR

A
Cheapest Retailer
-
€4,644 EUR
$5,188 USD
A
Retailer 2
-
€4,924 EUR
$5,501 USD
View
A
Retailer 3
-
€5,387 EUR
$6,018 USD
View
A
Retailer 4
-
€5,402 EUR
$6,035 USD
View
Retailer 5
-
€5,786 EUR
$6,464 USD
View
Price last confirmed 33 days ago
Retailer 6
-
€5,786 EUR
£5,090 GBP
View
Price last confirmed 22 days ago
Retailer 7
-
€5,984 EUR
$6,685 USD
View
Price last confirmed 56 days ago
B+
Retailer 8
-
€6,169 EUR
$6,892 USD
View
Final sale: no returns
A
Retailer 9
-
€6,190 EUR
$6,916 USD
View
Retailer 10
-
€6,316 EUR
$7,056 USD
View
Price last confirmed 33 days ago
A
Retailer 11
-
€6,395 EUR
$7,144 USD
View
A
Retailer 12
-
€6,409 EUR
£5,638 GBP
View
B+
Retailer 13
-
€6,458 EUR
$7,215 USD
View
B+
Retailer 14
-
€6,877 EUR
£6,050 GBP
View
B+
Retailer 15
-
€7,639 EUR
£6,720 GBP
View
B+
Retailer 16
-
€7,899 EUR
$8,825 USD
View
Retailer 17
-
€8,031 EUR
$8,972 USD
View
Price last confirmed 33 days ago
B+
Retailer 18
-
€8,633 EUR
View
B+
Retailer 19
-
€10,144 EUR
$11,333 USD
View
B+
Retailer 20
-
€10,975 EUR
£9,655 GBP
View
B+
Retailer 21
-
€11,654 EUR
$13,020 USD
View
B+
Retailer 22
-
€12,506 EUR
ZAR 225,716 ZAR
View
Retailer 23
-
€12,507 EUR
A$21,496 AUD
View
Price last confirmed 10 days ago
Retailer 24
-
€13,793 EUR
$15,410 USD
View
Price last confirmed 9 days ago
B
Retailer 25
-
€17,817 EUR
A$30,624 AUD
View
Most Expensive
B
Taylor and Hart
CY2A19R · Oct 31
€19,259 EUR
$21,516 USD
View
25 more retailers have this diamond
Prices start from €4,644 EURSave up to €14,615 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
3.51ct Marquise
€4,644 EUR