Radiant|Lab Grown|IGI

5.81ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG598338378

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG598338378

Diamond specifications and retailer prices

From €538 EUR
$601 USD
As of October 31, 2026
Save €3,007 EUR (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €3,545 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 5.81ct lab-grown radiant diamond

This 5.81ct lab-grown radiant 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 LG598338378 or 598338378. Listed at 12 retailers as of October 31, 2026, with prices from €538 to €3,545, a €3,007 spread on the same certified stone. Brilliant Earth lists it at €3,545. 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

5.81
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598338378
Dimensions12.53 × 8.97 × 5.99 mm
L/W Ratio1.40
Culet sizePointed
Top View
12.53 mm8.97 mm5.81 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598338378
Side View
Table 64.0%Crown 43.2°Girdle: MediumPavilion 35.2°Culet: NoneDepth 66.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: €3,545 EUR|Low: €384 EUR|High: €6,686 EUR|Avg: €1,544 EUR|-47.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 10€538 EUR
Retailer 9€595 EUR
Retailer 5€716 EUR
Retailer 2€920 EUR
Retailer 8€920 EUR
Retailer 4€936 EUR
Retailer 11€1,011 EUR
Retailer 7€1,537 EUR
Retailer 3€2,154 EUR
Retailer 6€2,490 EUR
Brilliant Earth€3,545 EUR

34 data points across 11 retailers

12 retailers€538 EUR to €3,545 EUR

Retailer 1
-
€538 EUR
$601 USD
Price last confirmed 35 days ago
A
Retailer 2
-
€538 EUR
$601 USD
View
Final sale: no returns
Retailer 3
-
€588 EUR
$657 USD
View
Price last confirmed 35 days ago
A
Retailer 4
-
€716 EUR
$800 USD
View
A
Retailer 5
-
€920 EUR
£809 GBP
View
B+
Retailer 6
-
€920 EUR
$1,028 USD
View
A
Retailer 7
-
€936 EUR
View
A
Retailer 8
-
€1,011 EUR
$1,130 USD
View
B+
Retailer 9
-
€1,537 EUR
$1,717 USD
View
B
Retailer 10
-
€2,154 EUR
$2,406 USD
View
B
Retailer 11
-
€2,490 EUR
£2,190 GBP
View
Most Expensive
B
Brilliant Earth
8057056A · Oct 31
€3,545 EUR
$3,960 USD
View
11 more retailers have this diamond
Prices start from €538 EURSave up to €3,007 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.

A
5.81ct Radiant
€538 EUR