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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 $1,475 SGD
$1,153 USD
As of November 1, 2026
Save $5,462 SGD (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,937 SGD 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 $1,475 to $6,937, a $5,462 spread on the same certified stone. Blue Nile lists it at $6,937. 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: $6,937 SGD|Low: $1,287 SGD|High: $6,937 SGD|Avg: $2,941 SGD
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$1,441 SGD
Retailer 4$1,475 SGD
Retailer 9$1,492 SGD
Retailer 12$1,605 SGD
Retailer 17$1,711 SGD
Retailer 16$1,739 SGD
Retailer 11$1,931 SGD
Retailer 6$2,399 SGD
Retailer 2$2,448 SGD
Retailer 10$2,472 SGD
Retailer 5$2,716 SGD
Retailer 3$3,206 SGD
Retailer 13$3,371 SGD
Retailer 15$5,526 SGD
Retailer 14$6,102 SGD
Retailer 7$6,906 SGD
Blue Nile$6,937 SGD

40 data points across 17 retailers

14 retailers$1,475 SGD to $6,937 SGD

A
Cheapest Retailer
-
$1,475 SGD
$1,153 USD
A
Retailer 2
-
$1,605 SGD
$1,255 USD
View
A
Retailer 3
-
$1,711 SGD
$1,338 USD
View
A
Retailer 4
-
$1,931 SGD
$1,510 USD
View
B+
Retailer 5
-
$2,399 SGD
$1,876 USD
View
B+
Retailer 6
-
$2,448 SGD
€1,823 EUR
View
B+
Retailer 7
-
$2,472 SGD
£1,522 GBP
View
B+
Retailer 8
-
$2,716 SGD
$2,124 USD
View
B+
Retailer 9
-
$3,206 SGD
$2,507 USD
View
B+
Retailer 10
-
$3,371 SGD
$2,636 USD
View
B
Retailer 11
-
$5,526 SGD
£3,402 GBP
View
B
Retailer 12
-
$6,102 SGD
$4,771 USD
View
B
Retailer 13
-
$6,906 SGD
$5,400 USD
View
Most Expensive
B
Blue Nile
25246920 · Oct 31
$6,937 SGD
$5,424 USD
View
13 more retailers have this diamond
Prices start from $1,475 SGDSave up to $5,462 SGD

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
$1,475 SGD