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Round|Lab Grown|IGI

3.03ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG621404128

Shape and cutting style on the report: Round brilliant

Certificate IGI LG621404128

Diamond specifications and retailer prices

From $400 USD
As of November 4, 2026
Save $1,321 USD (77%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,960 USD at Rare Carat · As of September 16, 2026
View at Rare Carat

About this 3.03ct lab-grown round diamond

This 3.03ct lab-grown round 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 LG621404128 or 621404128. Listed at 4 retailers as of November 4, 2026, with a 330% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle33.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621404128
Dimensions9.39 × 9.34 × 5.62 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.39 mm9.34 mm3.03 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621404128
Side View
Table 59.0%Crown 33.7°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.0%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $1,960 USD|Low: $400 USD|High: $2,700 USD|Avg: $1,304 USD
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
October 27, 2026
Retailer 2$400 USD
Retailer 11$706 USD
Retailer 8$743 USD
Retailer 6$783 USD
Retailer 10$930 USD
Retailer 9$932 USD
Retailer 13$1,048 USD
Retailer 7$1,230 USD
Retailer 4$1,301 USD
Retailer 12$1,721 USD
Rare Carat$1,960 USD
Retailer 3$2,490 USD
Retailer 5$2,700 USD

5 data points across 13 retailers

4 retailers$400 USD to $1,721 USD

A
Cheapest Retailer
-
$400 USD
Final sale: no returns
B+
Retailer 2
-
$1,301 USD
View
B
Retailer 3
-
$1,721 USD
View
Most Expensive
Rare Carat
100747272592_l_621404128 · Sep 16
$1,960 USD
View
Price last confirmed 51 days ago
3 more retailers have this diamond
Prices start from $400 USDSave up to $1,321 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 Round
$400 USD