CaratHunter
Plans
Round|Lab Grown|IGI

8.18ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG605381441

Shape and cutting style on the report: Round brilliant

Certificate IGI LG605381441

Diamond specifications and retailer prices

From $2,414 AUD
$1,696 USD
As of November 1, 2026
Save $5,145 AUD (68%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,559 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 8.18ct lab-grown round diamond

This 8.18ct 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 LG605381441 or 605381441. Listed at 14 retailers as of October 31, 2026, with prices from $2,414 to $7,559, a $5,145 spread on the same certified stone. Brilliant Earth lists it at $7,559. 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

8.18
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG605381441
Dimensions12.90 × 12.85 × 7.98 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
12.90 mm12.85 mm8.18 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605381441
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $7,559 AUD|Low: $1,637 AUD|High: $7,801 AUD|Avg: $3,679 AUD|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 3$1,637 AUD
Retailer 8$1,664 AUD
Retailer 10$2,414 AUD
Retailer 4$2,516 AUD
Retailer 9$2,615 AUD
Retailer 6$2,619 AUD
Retailer 2$2,685 AUD
Retailer 7$3,528 AUD
Retailer 5$5,550 AUD
Retailer 11$6,523 AUD
Brilliant Earth$7,559 AUD

37 data points across 11 retailers

14 retailers$2,414 AUD to $7,559 AUD

Retailer 1
-
$1,411 AUD
$991 USD
Price last confirmed 39 days ago
Retailer 2
-
$1,535 AUD
$1,078 USD
View
Price last confirmed 39 days ago
Retailer 3
-
$1,614 AUD
$1,134 USD
View
Price last confirmed 35 days ago
Retailer 4
-
$1,664 AUD
£920 GBP
View
Price last confirmed 16 days ago
B+
Retailer 5
-
$2,414 AUD
$1,696 USD
View
B+
Retailer 6
-
$2,516 AUD
£1,392 GBP
View
B+
Retailer 7
-
$2,615 AUD
$1,837 USD
View
B+
Retailer 8
-
$2,619 AUD
$1,840 USD
View
B+
Retailer 9
-
$2,685 AUD
€1,796 EUR
View
Retailer 10
-
$3,068 AUD
$2,155 USD
View
Price last confirmed 36 days ago
B+
Retailer 11
-
$3,528 AUD
$2,478 USD
View
B
Retailer 12
-
$5,550 AUD
£3,070 GBP
View
B
Retailer 13
-
$6,523 AUD
$4,582 USD
View
Most Expensive
B
Brilliant Earth
8497740A · Oct 31
$7,559 AUD
$5,310 USD
View
13 more retailers have this diamond
Prices start from $2,414 AUDSave up to $5,145 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.

B+
8.18ct Round
$2,414 AUD