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Round|Lab Grown|IGI

0.55ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451055359

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055359

Diamond specifications and retailer prices

From $419 AUD
$294 USD
As of November 1, 2026
Save $1,671 AUD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,090 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 0.55ct lab-grown round diamond

This 0.55ct lab-grown round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055359 or 451055359. Listed at 11 retailers as of October 29, 2026, with prices from $419 to $2,090, a $1,671 spread on the same certified stone. MOH London lists it at $2,090. 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

0.55
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055359
Dimensions5.18 × 5.21 × 3.28 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
5.18 mm5.21 mm0.55 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG451055359
Side View
Table 59.0%Crown 35.7°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.0%

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 1
Current: $2,090 AUD|Low: $401 AUD|High: $2,103 AUD|Avg: $891 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
Retailer 12
Retailer 13
October 29, 2026
Retailer 7$419 AUD
Retailer 12$468 AUD
Retailer 3$485 AUD
Retailer 8$512 AUD
Retailer 9$518 AUD
Retailer 11$518 AUD
Retailer 4$740 AUD
Retailer 10$850 AUD
Retailer 2$961 AUD
Retailer 5$1,035 AUD
Retailer 6$1,593 AUD
Retailer 13$1,667 AUD
MOH London$2,090 AUD

20 data points across 13 retailers

11 retailers$419 AUD to $2,090 AUD

A
Cheapest Retailer
-
$419 AUD
$294 USD
A
Retailer 2
-
$468 AUD
$329 USD
View
Final sale: no returns
A
Retailer 3
-
$485 AUD
$341 USD
View
B+
Retailer 4
-
$512 AUD
$360 USD
View
B+
Retailer 5
-
$518 AUD
$364 USD
View
B+
Retailer 6
-
$518 AUD
$364 USD
View
B+
Retailer 7
-
$850 AUD
$597 USD
View
B+
Retailer 8
-
$961 AUD
€643 EUR
View
B
Retailer 9
-
$1,593 AUD
$1,119 USD
View
B
Retailer 10
-
$1,667 AUD
$1,171 USD
View
Most Expensive
B
MOH London
LG451055359 · Oct 29
$2,090 AUD
£1,156 GBP
View
10 more retailers have this diamond
Prices start from $419 AUDSave up to $1,671 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
0.55ct Round
$419 AUD