Radiant|Lab Grown|IGI

3.03ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG685590258

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

Certificate IGI LG685590258

Diamond specifications and retailer prices

From $322 USD
As of November 6, 2026
Save $1,713 USD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,035 USD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 3.03ct lab-grown radiant diamond

This 3.03ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685590258 or 685590258. Listed at 16 retailers as of November 1, 2026, with prices from $322 to $2,035, a $1,713 spread on the same certified stone. Rare Carat lists it at $2,035. 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

3.03
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.5°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685590258
Dimensions10.36 × 7.04 × 4.81 mm
L/W Ratio1.47
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.36 mm7.04 mm3.03 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685590258
Side View
Table 64.0%Crown 45.5°Girdle: MediumPavilion 35.7°Culet: NoneDepth 68.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,035 USD|Low: $322 USD|High: $5,070 USD|Avg: $1,342 USD|-30.4%
Rare Carat
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 7, 2026
Retailer 7$322 USD
Retailer 14$374 USD
Retailer 4$400 USD
Retailer 6$448 USD
Retailer 11$486 USD
Retailer 2$555 USD
Retailer 17$648 USD
Retailer 10$651 USD
Retailer 12$706 USD
Retailer 16$718 USD
Retailer 3$974 USD
Retailer 15$1,172 USD
Retailer 5$1,285 USD
Retailer 13$1,597 USD
Rare Carat$2,035 USD
Retailer 8$3,822 USD
Retailer 9$5,070 USD

12 data points across 17 retailers

16 retailers$322 USD to $2,035 USD

A
Cheapest Retailer
-
$322 USD
A
Retailer 2
-
$374 USD
View
A
Retailer 3
-
$400 USD
View
A
Retailer 4
-
$448 USD
View
A
Retailer 5
-
$486 USD
View
A
Retailer 6
-
$555 USD
View
B+
Retailer 7
-
$648 USD
View
A
Retailer 8
-
$651 USD
View
A
Retailer 9
-
$706 USD
View
A
Retailer 10
-
$718 USD
View
A
Retailer 11
-
$974 USD
View
B+
Retailer 12
-
$1,172 USD
View
B+
Retailer 13
-
$1,285 USD
View
B+
Retailer 14
-
$1,597 USD
View
B+
Retailer 15
-
$1,631 USD
View
Most Expensive
B
Rare Carat
KI2585902KF685 · Nov 1
$2,035 USD
View
15 more retailers have this diamond
Prices start from $322 USDSave up to $1,713 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.

A
3.03ct Radiant
$322 USD