Round|Lab Grown|IGI

6.31ct H VS2 Round Lab Grown Diamond

ID • H/VS2 • IGI LG581318516

Shape and cutting style on the report: Round brilliant

Certificate IGI LG581318516

Diamond specifications and retailer prices

From $948 USD

As of October 29, 2026

Save $3,404 USD (78%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: $4,352 USD at Blue Nile · As of October 29, 2026

View at Blue Nile

About this 6.31ct lab-grown round diamond

This 6.31ct lab-grown round sits in the over five carat band, graded H colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG581318516 or 581318516. Listed at 16 retailers as of October 29, 2026, with prices from $948 to $4,352, a $3,404 spread on the same certified stone. Blue Nile lists it at $4,352. 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

6.31

Carat

Color

VS2

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35°

Pavilion angle41°

OriginLab Grown

Grading LabIGI

CertificateIGI LG581318516

Dimensions11.83 × 11.74 × 7.34 mm

L/W Ratio1.01

Girdle conditionFaceted

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG581318516

Side View

Caratlytics Score

How it works →

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 29

Current: $4,352 USD|Low: $632 USD|High: $4,470 USD|Avg: $2,114 USD|+0.0%

Blue Nile

Retailer 2

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Retailer 11

Retailer 12

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Retailer 18

October 29, 2026

Retailer 9$885 USD

Retailer 3$948 USD

Retailer 12$1,031 USD

Retailer 14$1,100 USD

Retailer 16$1,100 USD

Retailer 17$1,565 USD

Retailer 4$1,575 USD

Retailer 2$1,580 USD

Retailer 15$1,644 USD

Retailer 6$1,759 USD

Retailer 5$2,270 USD

Retailer 13$2,370 USD

Retailer 18$3,092 USD

Retailer 11$3,735 USD

Retailer 7$3,827 USD

Retailer 10$4,079 USD

Retailer 8$4,340 USD

Blue Nile$4,352 USD

33 data points across 18 retailers

16 retailers$948 USD to $4,352 USD

Cheapest Retailer

$948 USD

Retailer 2

$1,031 USD

View

Retailer 3

$1,100 USD

View

Price last confirmed 12 days ago

Retailer 4

$1,100 USD

View

B+

Retailer 5

$1,565 USD

View

B+

Retailer 6

$1,575 USD

View

B+

Retailer 7

$1,580 USD

€1,505 EUR

View

B+

Retailer 8

$1,644 USD

£1,295 GBP

View

Price last confirmed 12 days ago

B+

Retailer 9

$1,759 USD

View

B+

Retailer 10

$2,270 USD

View

B+

Retailer 11

$2,370 USD

View

Retailer 12

$3,092 USD

View

Retailer 13

$3,735 USD

£2,941 GBP

View

Retailer 14

$3,827 USD

View

Price last confirmed 11 days ago

Retailer 15

$4,340 USD

View

Most Expensive

Blue Nile

25245800 · Oct 29

$4,352 USD

View

15 more retailers have this diamond

Prices start from $948 USDSave up to $3,404 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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6.31ct Round

$948 USD