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Round|Lab Grown|IGI

1.05ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG451055603

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055603

Diamond specifications and retailer prices

From $730 USD
As of October 29, 2026
Save $3,268 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,998 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055603 or 451055603. Listed at 11 retailers as of October 29, 2026, with prices from $730 to $3,998, a $3,268 spread on the same certified stone. MOH London lists it at $3,998. 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

1.05
Carat
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055603
Dimensions6.44 × 6.47 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.44 mm6.47 mm1.05 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055603
Side View
Table 57.5%Crown 34.9°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 63.4%

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: Oct 29
Current: $3,998 USD|Low: $730 USD|High: $4,025 USD|Avg: $1,854 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 5$730 USD
Retailer 4$1,011 USD
Retailer 9$1,131 USD
Retailer 6$1,172 USD
Retailer 8$1,172 USD
Retailer 10$1,686 USD
Retailer 7$1,873 USD
Retailer 2$2,013 USD
Retailer 11$2,450 USD
Retailer 3$2,624 USD
MOH London$3,998 USD

19 data points across 11 retailers

11 retailers$730 USD to $3,998 USD

A
Cheapest Retailer
-
$730 USD
B+
Retailer 2
-
$1,011 USD
View
B+
Retailer 3
-
$1,100 USD
View
B+
Retailer 4
-
$1,131 USD
View
Final sale: no returns
Retailer 5
-
$1,172 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
$1,172 USD
View
B
Retailer 7
-
$1,873 USD
View
B
Retailer 8
-
$2,013 USD
€1,917 EUR
View
B
Retailer 9
-
$2,198 USD
View
B
Retailer 10
-
$2,450 USD
View
Most Expensive
B
MOH London
LG451055603 · Oct 29
$3,998 USD
£3,148 GBP
View
10 more retailers have this diamond
Prices start from $730 USDSave up to $3,268 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
1.05ct Round
$730 USD