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Round|Lab Grown|IGI

1.03ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG305803517

Shape and cutting style on the report: Round brilliant

Certificate IGI LG305803517

Diamond specifications and retailer prices

From €336 EUR
As of November 2, 2026
Save €136 EUR (29%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €473 EUR at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG305803517 or 305803517. Listed at 2 retailers as of November 1, 2026, with prices from €336 to €473, a €136 spread on the same certified stone. Brilliant Earth lists it at €473. 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

1.03
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG305803517
Dimensions6.44 × 6.41 × 4.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANTThis Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
6.44 mm6.41 mm1.03 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG305803517
Side View
Table 59.5%Crown 35.6°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: €473 EUR|Low: €275 EUR|High: €473 EUR|Avg: €360 EUR
Brilliant Earth
Retailer 2
Retailer 3
November 2, 2026
Retailer 3€275 EUR
Retailer 2€336 EUR
Brilliant Earth€473 EUR

12 data points across 3 retailers

2 retailers€336 EUR to €473 EUR

B+
Cheapest Retailer
-
€336 EUR
Most Expensive
B
Brilliant Earth
16336212A · Nov 1
€473 EUR
$530 USD
View
1 more retailer has this diamond
Prices start from €336 EURSave up to €136 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.

B+
1.03ct Round
€336 EUR