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 €1,032 EUR

$1,153 USD

As of October 29, 2026

Save €3,823 EUR (79%) vs most expensive(unlock to see where)

15 retailers carry this diamond

Most expensive: €4,855 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 15 retailers as of October 29, 2026, with prices from €1,032 to €4,855, a €3,823 spread on the same certified stone. Blue Nile lists it at €4,855. 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

Color

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: Oct 29

Current: €4,855 EUR|Low: €900 EUR|High: €4,855 EUR|Avg: €2,034 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

October 31, 2026

Retailer 8€1,009 EUR

Retailer 4€1,032 EUR

Retailer 9€1,045 EUR

Retailer 12€1,123 EUR

Retailer 17€1,198 EUR

Retailer 16€1,217 EUR

Retailer 10€1,352 EUR

Retailer 6€1,679 EUR

Retailer 2€1,707 EUR

Retailer 11€1,730 EUR

Retailer 5€1,901 EUR

Retailer 3€2,244 EUR

Retailer 13€2,359 EUR

Retailer 15€3,867 EUR

Retailer 14€4,270 EUR

Retailer 7€4,833 EUR

Blue Nile€4,855 EUR

40 data points across 17 retailers

15 retailers€1,032 EUR to €4,855 EUR

Cheapest Retailer

€1,032 EUR

$1,153 USD

Retailer 2

€1,123 EUR

$1,255 USD

View

Retailer 3

€1,198 EUR

$1,338 USD

View

Retailer 4

€1,217 EUR

£1,071 GBP

View

Price last confirmed 15 days ago

Retailer 5

€1,352 EUR

$1,510 USD

View

B+

Retailer 6

€1,679 EUR

$1,876 USD

View

B+

Retailer 7

€1,707 EUR

View

B+

Retailer 8

€1,730 EUR

£1,522 GBP

View

B+

Retailer 9

€1,901 EUR

$2,124 USD

View

B+

Retailer 10

€2,244 EUR

$2,507 USD

View

B+

Retailer 11

€2,359 EUR

$2,636 USD

View

Retailer 12

€3,867 EUR

£3,402 GBP

View

Retailer 13

€4,270 EUR

$4,771 USD

View

Retailer 14

€4,833 EUR

$5,400 USD

View

Most Expensive

Blue Nile

25246920 · Oct 31

€4,855 EUR

$5,424 USD

View

14 more retailers have this diamond

Prices start from €1,032 EURSave up to €3,823 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.

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8.31ct Round

€1,032 EUR