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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 $1,696 USD
As of October 30, 2026
Save $3,614 USD (68%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,310 USD at Brilliant Earth · As of October 29, 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 29, 2026, with prices from $1,696 to $5,310, a $3,614 spread on the same certified stone. Brilliant Earth lists it at $5,310. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $5,310 USD|Low: $1,150 USD|High: $5,480 USD|Avg: $2,587 USD|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 3$1,150 USD
Retailer 8$1,169 USD
Retailer 10$1,696 USD
Retailer 4$1,768 USD
Retailer 9$1,837 USD
Retailer 6$1,840 USD
Retailer 2$1,878 USD
Retailer 7$2,478 USD
Retailer 5$3,919 USD
Retailer 11$4,582 USD
Brilliant Earth$5,310 USD

37 data points across 11 retailers

14 retailers$1,696 USD to $5,310 USD

Retailer 1
-
$991 USD
Price last confirmed 37 days ago
Retailer 2
-
$1,078 USD
View
Price last confirmed 37 days ago
Retailer 3
-
$1,134 USD
View
Price last confirmed 33 days ago
Retailer 4
-
$1,169 USD
£920 GBP
View
Price last confirmed 14 days ago
B+
Retailer 5
-
$1,696 USD
View
B+
Retailer 6
-
$1,768 USD
£1,392 GBP
View
B+
Retailer 7
-
$1,837 USD
View
B+
Retailer 8
-
$1,840 USD
View
B+
Retailer 9
-
$1,878 USD
€1,789 EUR
View
Retailer 10
-
$2,155 USD
View
Price last confirmed 34 days ago
B+
Retailer 11
-
$2,478 USD
View
B
Retailer 12
-
$3,919 USD
£3,086 GBP
View
B
Retailer 13
-
$4,582 USD
View
Most Expensive
B
Brilliant Earth
8497740A · Oct 29
$5,310 USD
View
13 more retailers have this diamond
Prices start from $1,696 USDSave up to $3,614 USD

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
$1,696 USD