Round|Lab Grown|IGI

8.31ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG595371329

Shape and cutting style on the report: Round brilliant

Certificate IGI LG595371329

Diamond specifications and retailer prices

From €1,028 EUR

$1,153 USD

As of November 1, 2026

Save €3,808 EUR (79%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: €4,836 EUR at Blue Nile · As of October 31, 2026

View at Blue Nile

About this 8.31ct lab-grown round diamond

This 8.31ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG595371329 or 595371329. Listed at 14 retailers as of October 31, 2026, with prices from €1,028 to €4,836, a €3,808 spread on the same certified stone. Blue Nile lists it at €4,836. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

8.31

Carat

Colour

SI1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.5°

Pavilion angle40.6°

OriginLab Grown

Grading LabIGI

CertificateIGI LG595371329

Dimensions13.00 × 12.92 × 7.98 mm

L/W Ratio1.01

Girdle conditionFaceted

Culet sizePointed

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG595371329

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: Nov 1

Current: €4,836 EUR|Low: €897 EUR|High: €4,836 EUR|Avg: €2,043 EUR

Blue Nile

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

Retailer 15

Retailer 16

Retailer 17

November 2, 2026

Retailer 8€1,005 EUR

Retailer 4€1,028 EUR

Retailer 9€1,040 EUR

Retailer 12€1,119 EUR

Retailer 17€1,193 EUR

Retailer 16€1,212 EUR

Retailer 11€1,346 EUR

Retailer 6€1,673 EUR

Retailer 2€1,707 EUR

Retailer 10€1,723 EUR

Retailer 5€1,894 EUR

Retailer 3€2,235 EUR

Retailer 13€2,350 EUR

Retailer 15€3,852 EUR

Retailer 14€4,254 EUR

Retailer 7€4,815 EUR

Blue Nile€4,836 EUR

41 data points across 17 retailers

14 retailers€1,028 EUR to €4,836 EUR

Cheapest Retailer

€1,028 EUR

$1,153 USD

Retailer 2

€1,119 EUR

$1,255 USD

View

Retailer 3

€1,193 EUR

$1,338 USD

View

Retailer 4

€1,346 EUR

$1,510 USD

View

B+

Retailer 5

€1,673 EUR

$1,876 USD

View

B+

Retailer 6

€1,707 EUR

View

B+

Retailer 7

€1,723 EUR

£1,522 GBP

View

B+

Retailer 8

€1,894 EUR

$2,124 USD

View

B+

Retailer 9

€2,235 EUR

$2,507 USD

View

B+

Retailer 10

€2,350 EUR

$2,636 USD

View

Retailer 11

€3,852 EUR

£3,402 GBP

View

Retailer 12

€4,254 EUR

$4,771 USD

View

Retailer 13

€4,815 EUR

$5,400 USD

View

Most Expensive

Blue Nile

25246920 · Oct 31

€4,836 EUR

$5,424 USD

View

13 more retailers have this diamond

Prices start from €1,028 EURSave up to €3,808 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.

Similar diamonds

8.31ct Round

€1,028 EUR