Radiant|Lab Grown|IGI

10.03ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG589378020

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

Certificate IGI LG589378020

Diamond specifications and retailer prices

From $1,385 USD
As of November 1, 2026
Save $4,755 USD (77%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,140 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 10.03ct lab-grown radiant diamond

This 10.03ct lab-grown radiant sits in the over five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG589378020 or 589378020. Listed at 8 retailers as of October 29, 2026, with prices from $1,385 to $6,140, a $4,755 spread on the same certified stone. Brilliant Earth lists it at $6,140. 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

10.03
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.4°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG589378020
Dimensions15.13 × 10.62 × 7.26 mm
L/W Ratio1.42
Culet sizePointed
Top View
15.13 mm10.62 mm10.03 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG589378020
Side View
Table 64.0%Crown 45.4°Girdle: MediumPavilion 35.3°Culet: NoneDepth 68.4%

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 1
Current: $6,140 USD|Low: $1,209 USD|High: $6,330 USD|Avg: $3,079 USD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 28, 2026
Retailer 6$1,209 USD
Retailer 2$1,385 USD
Retailer 7$1,825 USD
Retailer 5$1,928 USD
Retailer 3$2,100 USD
Retailer 4$2,527 USD
Retailer 8$6,074 USD
Brilliant Earth$6,140 USD

19 data points across 8 retailers

8 retailers$1,385 USD to $6,140 USD

Retailer 1
-
$1,209 USD
Price last confirmed 22 days ago
A
Retailer 2
-
$1,385 USD
View
B+
Retailer 3
-
$1,825 USD
View
B+
Retailer 4
-
$1,928 USD
View
Retailer 5
-
$2,100 USD
€2,000 EUR
View
Price last confirmed 9 days ago
B
Retailer 6
-
$2,527 USD
View
B
Retailer 7
-
$6,074 USD
View
Most Expensive
B
Brilliant Earth
7682429A · Oct 29
$6,140 USD
View
7 more retailers have this diamond
Prices start from $1,385 USDSave up to $4,755 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
10.03ct Radiant
$1,385 USD