Round|Lab Grown|IGI

3.78ct D VS1 Round Lab Grown Diamond

EX • D/VS1 • IGI LG809671388

Shape and cutting style on the report: Round brilliant

Certificate IGI LG809671388

Diamond specifications and retailer prices

From $593 USD

As of October 29, 2026

Save $4,797 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 LG809671388 or 809671388. Listed at 14 retailers as of October 29, 2026, with prices from $593 to $5,390, a $4,797 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

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle32.4°

Pavilion angle41.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG809671388

Dimensions10.01 × 10.09 × 6.02 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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG809671388

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: $2,403 USD|-3.1%

Brilliant Earth

Retailer 2

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Retailer 11

Retailer 12

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Retailer 17

October 29, 2026

Retailer 15$593 USD

Retailer 13$664 USD

Retailer 17$946 USD

Retailer 5$1,112 USD

Retailer 2$1,120 USD

Retailer 7$1,172 USD

Retailer 12$1,562 USD

Retailer 14$1,824 USD

Retailer 11$1,825 USD

Retailer 16$1,934 USD

Retailer 3$2,230 USD

Retailer 8$2,533 USD

Retailer 6$2,949 USD

Retailer 10$3,195 USD

Retailer 4$3,377 USD

Retailer 9$4,640 USD

Brilliant Earth$5,390 USD

29 data points across 17 retailers

14 retailers$593 USD to $5,390 USD

Cheapest Retailer

$593 USD

Retailer 2

$664 USD

View

Retailer 3

$946 USD

£745 GBP

View

Price last confirmed 13 days ago

Retailer 4

$1,112 USD

View

Retailer 5

$1,120 USD

€1,067 EUR

View

Retailer 6

$1,562 USD

A$2,403 AUD

View

Price last confirmed 9 days ago

B+

Retailer 7

$1,824 USD

View

B+

Retailer 8

$1,825 USD

View

B+

Retailer 9

$1,934 USD

View

B+

Retailer 10

$2,230 USD

View

Retailer 11

$2,949 USD

SGD 3,985 SGD

View

Price last confirmed 17 days ago

Retailer 12

$3,195 USD

£2,516 GBP

View

Retailer 13

$3,377 USD

View

Most Expensive

Brilliant Earth

20805287A · Oct 29

$5,390 USD

View

13 more retailers have this diamond

Prices start from $593 USDSave up to $4,797 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

$593 USD