Marquise|Lab Grown|IGI

3.51ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG768631099

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG768631099

Diamond specifications and retailer prices

From €6,454 EUR

$7,210 USD

As of October 28, 2026

Save €13,815 EUR (68%) vs most expensive(unlock to see where)

9 retailers carry this diamond

Most expensive: €20,268 EUR at Novita Diamonds · As of November 1, 2026

View at Novita Diamonds

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 LG768631099 or 768631099. Listed at 9 retailers as of October 28, 2026, with prices from €6,454 to €20,268, a €13,815 spread on the same certified stone. Novita Diamonds lists it at €20,268. 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

Color

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle32.1°

Pavilion angle41.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG768631099

Dimensions17.01 × 7.72 × 4.76 mm

L/W Ratio2.20

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

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG768631099

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28

Current: €20,268 EUR|Low: €4,784 EUR|High: €32,671 EUR|Avg: €13,348 EUR|-1.8%

Novita Diamonds

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November 1, 2026

Retailer 19€4,784 EUR

Retailer 5€5,319 EUR

Retailer 4€5,505 EUR

Retailer 13€6,454 EUR

Retailer 11€6,811 EUR

Retailer 16€7,145 EUR

Retailer 20€7,522 EUR

Retailer 12€9,123 EUR

Retailer 7€9,765 EUR

Retailer 14€9,899 EUR

Retailer 2€11,493 EUR

Retailer 18€12,482 EUR

Retailer 17€14,128 EUR

Retailer 15€15,199 EUR

Retailer 10€18,455 EUR

Retailer 6€18,968 EUR

Novita Diamonds€20,268 EUR

Retailer 9€24,469 EUR

Retailer 8€25,455 EUR

Retailer 3€32,563 EUR

16 data points across 20 retailers

9 retailers€6,454 EUR to €20,268 EUR

Retailer 1

€4,544 EUR

$5,077 USD

Price last confirmed 30 days ago

Retailer 2

€4,961 EUR

$5,542 USD

View

Price last confirmed 33 days ago

B+

Retailer 3

€6,454 EUR

$7,210 USD

View

Retailer 4

€7,145 EUR

$7,982 USD

View

Price last confirmed 30 days ago

Retailer 5

€7,195 EUR

$8,038 USD

View

Price last confirmed 32 days ago

B+

Retailer 6

€11,493 EUR

$12,840 USD

View

Retailer 7

€12,482 EUR

£10,980 GBP

View

Price last confirmed 31 days ago

Retailer 8

€14,128 EUR

A$24,283 AUD

View

Price last confirmed 34 days ago

Most Expensive

Novita Diamonds

cert_768631099 · Nov 1

€20,268 EUR

A$34,837 AUD

View

8 more retailers have this diamond

Prices start from €6,454 EURSave up to €13,815 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.

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B+

3.51ct Marquise

€6,454 EUR