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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 $1,641 AUD
$1,153 USD
As of November 1, 2026
Save $6,080 AUD (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,722 AUD 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 31, 2026, with prices from $1,641 to $7,722, a $6,080 spread on the same certified stone. Blue Nile lists it at $7,722. 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
G
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
Top View
13.00 mm12.92 mm8.31 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG595371329
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
A
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: $7,722 AUD|Low: $1,432 AUD|High: $7,722 AUD|Avg: $3,262 AUD
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$1,604 AUD
Retailer 4$1,641 AUD
Retailer 9$1,661 AUD
Retailer 12$1,787 AUD
Retailer 17$1,905 AUD
Retailer 16$1,936 AUD
Retailer 11$2,150 AUD
Retailer 6$2,671 AUD
Retailer 10$2,715 AUD
Retailer 2$2,751 AUD
Retailer 5$3,024 AUD
Retailer 3$3,569 AUD
Retailer 13$3,753 AUD
Retailer 15$6,151 AUD
Retailer 14$6,792 AUD
Retailer 7$7,687 AUD
Blue Nile$7,722 AUD

41 data points across 17 retailers

15 retailers$1,641 AUD to $7,722 AUD

A
Cheapest Retailer
-
$1,641 AUD
$1,153 USD
A
Retailer 2
-
$1,787 AUD
$1,255 USD
View
A
Retailer 3
-
$1,905 AUD
$1,338 USD
View
Retailer 4
-
$1,936 AUD
£1,071 GBP
View
Price last confirmed 16 days ago
A
Retailer 5
-
$2,150 AUD
$1,510 USD
View
B+
Retailer 6
-
$2,671 AUD
$1,876 USD
View
B+
Retailer 7
-
$2,715 AUD
€1,816 EUR
View
B+
Retailer 8
-
$2,751 AUD
£1,522 GBP
View
B+
Retailer 9
-
$3,024 AUD
$2,124 USD
View
B+
Retailer 10
-
$3,569 AUD
$2,507 USD
View
B+
Retailer 11
-
$3,753 AUD
$2,636 USD
View
B
Retailer 12
-
$6,151 AUD
£3,402 GBP
View
B
Retailer 13
-
$6,792 AUD
$4,771 USD
View
B
Retailer 14
-
$7,687 AUD
$5,400 USD
View
Most Expensive
B
Blue Nile
25246920 · Oct 31
$7,722 AUD
$5,424 USD
View
14 more retailers have this diamond
Prices start from $1,641 AUDSave up to $6,080 AUD

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.

A
8.31ct Round
$1,641 AUD