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 $7,210 USD

As of October 28, 2026

Save $15,434 USD (68%) vs most expensive(unlock to see where)

9 retailers carry this diamond

Most expensive: $22,644 USD 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 $7,210 to $22,644, a $15,434 spread on the same certified stone. Novita Diamonds lists it at $22,644. 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: $22,644 USD|Low: $5,345 USD|High: $36,500 USD|Avg: $14,913 USD|-1.8%

Novita Diamonds

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November 1, 2026

Retailer 19$5,345 USD

Retailer 5$5,942 USD

Retailer 4$6,150 USD

Retailer 13$7,210 USD

Retailer 11$7,610 USD

Retailer 16$7,982 USD

Retailer 20$8,404 USD

Retailer 12$10,192 USD

Retailer 7$10,909 USD

Retailer 14$11,060 USD

Retailer 2$12,840 USD

Retailer 18$13,945 USD

Retailer 17$15,784 USD

Retailer 15$16,981 USD

Retailer 10$20,618 USD

Retailer 6$21,191 USD

Novita Diamonds$22,644 USD

Retailer 9$27,337 USD

Retailer 8$28,438 USD

Retailer 3$36,380 USD

16 data points across 20 retailers

9 retailers$7,210 USD to $22,644 USD

Retailer 1

$5,077 USD

Price last confirmed 30 days ago

Retailer 2

$5,542 USD

View

Price last confirmed 33 days ago

B+

Retailer 3

$7,210 USD

View

Retailer 4

$7,982 USD

View

Price last confirmed 30 days ago

Retailer 5

$8,038 USD

View

Price last confirmed 32 days ago

B+

Retailer 6

$12,840 USD

View

Retailer 7

$13,945 USD

£10,980 GBP

View

Price last confirmed 31 days ago

Retailer 8

$15,784 USD

A$24,283 AUD

View

Price last confirmed 33 days ago

Most Expensive

Novita Diamonds

cert_768631099 · Nov 1

$22,644 USD

A$34,837 AUD

View

8 more retailers have this diamond

Prices start from $7,210 USDSave up to $15,434 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.

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3.51ct Marquise

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