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Round|Lab Grown|IGI

1.09ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG451057063

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057063

Diamond specifications and retailer prices

From $911 AUD
$640 USD
As of October 31, 2026
Save $5,523 AUD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,435 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct 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 LG451057063 or 451057063. Listed at 13 retailers as of October 31, 2026, with prices from $911 to $6,435, a $5,523 spread on the same certified stone. MOH London lists it at $6,435. 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

1.09
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057063
Dimensions6.53 × 6.56 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.53 mm6.56 mm1.09 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057063
Side View
Table 56.5%Crown 35.9°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.5%

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: $6,435 AUD|Low: $911 AUD|High: $6,521 AUD|Avg: $2,763 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 7$911 AUD
Retailer 9$1,727 AUD
Retailer 13$1,878 AUD
Retailer 3$1,933 AUD
Retailer 10$2,003 AUD
Retailer 12$2,003 AUD
Retailer 4$2,249 AUD
Retailer 2$2,621 AUD
Retailer 5$2,806 AUD
Retailer 11$3,176 AUD
Retailer 8$3,428 AUD
Retailer 14$3,754 AUD
Retailer 6$3,837 AUD
MOH London$6,435 AUD

38 data points across 14 retailers

13 retailers$911 AUD to $6,435 AUD

A
Cheapest Retailer
-
$911 AUD
$640 USD
B+
Retailer 2
-
$1,727 AUD
$1,213 USD
View
B+
Retailer 3
-
$1,878 AUD
$1,319 USD
View
B+
Retailer 4
-
$1,933 AUD
$1,358 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,003 AUD
$1,407 USD
View
Retailer 6
-
$2,003 AUD
$1,407 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
$2,249 AUD
$1,580 USD
View
B+
Retailer 8
-
$2,621 AUD
£1,450 GBP
View
B
Retailer 9
-
$3,176 AUD
$2,231 USD
View
B
Retailer 10
-
$3,428 AUD
€2,293 EUR
View
B
Retailer 11
-
$3,754 AUD
$2,637 USD
View
B
Retailer 12
-
$3,837 AUD
$2,695 USD
View
Most Expensive
B
MOH London
LG451057063 · Nov 1
$6,435 AUD
£3,559 GBP
View
12 more retailers have this diamond
Prices start from $911 AUDSave up to $5,523 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
1.09ct Round
$911 AUD