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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 $868 AUD
$610 USD
As of October 30, 2026
Save $4,823 AUD (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,691 AUD 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 $868 to $5,691, a $4,823 spread on the same certified stone. MOH London lists it at $5,691. 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
Colour
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 30
Current: $5,691 AUD|Low: $868 AUD|High: $5,729 AUD|Avg: $2,634 AUD|+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 30, 2026
Retailer 2$868 AUD
Retailer 5$1,439 AUD
Retailer 9$1,610 AUD
Retailer 6$1,668 AUD
Retailer 8$1,668 AUD
Retailer 10$2,400 AUD
Retailer 7$2,666 AUD
Retailer 4$2,865 AUD
Retailer 11$3,488 AUD
Retailer 3$3,736 AUD
MOH London$5,691 AUD

20 data points across 11 retailers

11 retailers$868 AUD to $5,691 AUD

A
Cheapest Retailer
-
$868 AUD
$610 USD
B+
Retailer 2
-
$1,439 AUD
$1,011 USD
View
B+
Retailer 3
-
$1,566 AUD
$1,100 USD
View
B+
Retailer 4
-
$1,610 AUD
$1,131 USD
View
Final sale: no returns
Retailer 5
-
$1,668 AUD
$1,172 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$1,668 AUD
$1,172 USD
View
B
Retailer 7
-
$2,666 AUD
$1,873 USD
View
B
Retailer 8
-
$2,865 AUD
€1,917 EUR
View
B
Retailer 9
-
$3,129 AUD
$2,198 USD
View
B
Retailer 10
-
$3,488 AUD
$2,450 USD
View
Most Expensive
B
MOH London
LG451055603 · Oct 29
$5,691 AUD
£3,148 GBP
View
10 more retailers have this diamond
Prices start from $868 AUDSave up to $4,823 AUD

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
$868 AUD