Round|Lab Grown|IGI

3.78ct D VS1 Round Lab Grown Diamond

ID • D/VS1 • IGI LG815601387

Shape and cutting style on the report: Round brilliant

Certificate IGI LG815601387

Diamond specifications and retailer prices

From $607 USD

As of October 29, 2026

Save $4,783 USD (89%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: $5,390 USD at Brilliant Earth · As of October 29, 2026

View at Brilliant Earth

About this 3.78ct lab-grown round diamond

This 3.78ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG815601387 or 815601387. Listed at 14 retailers as of October 29, 2026, with prices from $607 to $5,390, a $4,783 spread on the same certified stone. Brilliant Earth lists it at $5,390. 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

3.78

Carat

Color

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33°

Pavilion angle41.4°

OriginLab Grown

Grading LabIGI

CertificateIGI LG815601387

Dimensions9.93 × 10.01 × 6.11 mm

L/W Ratio1.01

Girdle conditionFaceted

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG815601387

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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

Price History

Last verified: Oct 29

Current: $5,390 USD|Low: $587 USD|High: $5,560 USD|Avg: $2,318 USD|-3.1%

Brilliant Earth

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 12$607 USD

Retailer 10$680 USD

Retailer 14$969 USD

Retailer 5$1,128 USD

Retailer 2$1,131 USD

Retailer 9$1,600 USD

Retailer 11$1,868 USD

Retailer 8$1,870 USD

Retailer 13$1,980 USD

Retailer 3$2,252 USD

Retailer 6$2,949 USD

Retailer 7$3,285 USD

Retailer 4$3,411 USD

Brilliant Earth$5,390 USD

30 data points across 14 retailers

14 retailers$607 USD to $5,390 USD

Cheapest Retailer

$607 USD

Retailer 2

$680 USD

View

Retailer 3

$969 USD

£763 GBP

View

Price last confirmed 13 days ago

Retailer 4

$1,128 USD

View

Retailer 5

$1,131 USD

€1,077 EUR

View

Retailer 6

$1,600 USD

A$2,461 AUD

View

Price last confirmed 9 days ago

B+

Retailer 7

$1,868 USD

View

B+

Retailer 8

$1,870 USD

View

B+

Retailer 9

$1,980 USD

View

B+

Retailer 10

$2,252 USD

View

Retailer 11

$2,949 USD

SGD 3,985 SGD

View

Price last confirmed 17 days ago

Retailer 12

$3,285 USD

£2,587 GBP

View

Retailer 13

$3,411 USD

View

Most Expensive

Brilliant Earth

20803019A · Oct 29

$5,390 USD

View

13 more retailers have this diamond

Prices start from $607 USDSave up to $4,783 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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3.78ct Round

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