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Round|Lab Grown|IGI

1.05ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG450028054

Shape and cutting style on the report: Round brilliant

Certificate IGI LG450028054

Diamond specifications and retailer prices

From $868 AUD
$610 USD
As of October 31, 2026
Save $5,335 AUD (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,203 AUD at MOH London · As of November 1, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG450028054 or 450028054. Listed at 12 retailers as of October 31, 2026, with prices from $868 to $6,203, a $5,335 spread on the same certified stone. MOH London lists it at $6,203. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG450028054
Dimensions6.54 × 6.57 × 3.98 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD). Type IIa
Top View
6.54 mm6.57 mm1.05 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG450028054
Side View
Table 60.0%Crown 33.9°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 60.8%

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 31
Current: $6,203 AUD|Low: $868 AUD|High: $6,286 AUD|Avg: $3,004 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 2$868 AUD
Retailer 6$1,664 AUD
Retailer 10$1,863 AUD
Retailer 7$1,930 AUD
Retailer 9$1,930 AUD
Retailer 11$2,178 AUD
Retailer 12$2,716 AUD
Retailer 8$3,065 AUD
Retailer 5$3,306 AUD
Retailer 3$3,805 AUD
Retailer 4$5,529 AUD
MOH London$6,203 AUD

22 data points across 12 retailers

12 retailers$868 AUD to $6,203 AUD

A
Cheapest Retailer
-
$868 AUD
$610 USD
B+
Retailer 2
-
$1,664 AUD
$1,169 USD
View
B+
Retailer 3
-
$1,811 AUD
$1,272 USD
View
B+
Retailer 4
-
$1,863 AUD
$1,309 USD
View
Final sale: no returns
Retailer 5
-
$1,930 AUD
$1,356 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$1,930 AUD
$1,356 USD
View
B
Retailer 7
-
$2,178 AUD
$1,530 USD
View
B
Retailer 8
-
$3,065 AUD
$2,153 USD
View
B
Retailer 9
-
$3,306 AUD
€2,212 EUR
View
B
Retailer 10
-
$3,619 AUD
$2,542 USD
View
B
Retailer 11
-
$3,805 AUD
$2,673 USD
View
Most Expensive
B
MOH London
LG450028054 · Nov 1
$6,203 AUD
£3,431 GBP
View
11 more retailers have this diamond
Prices start from $868 AUDSave up to $5,335 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