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Round|Lab Grown|IGI

1.55ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG816613920

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816613920

Diamond specifications and retailer prices

From $273 AUD
$192 USD
As of November 1, 2026
Save $1,310 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,584 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816613920 or 816613920. Listed at 15 retailers as of November 1, 2026, with prices from $273 to $1,584, a $1,310 spread on the same certified stone. MOH London lists it at $1,584. 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

1.55
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816613920
Dimensions7.46 × 7.40 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.46 mm7.40 mm1.55 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816613920
Side View
Table 55.0%Crown 34.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,584 AUD|Low: $273 AUD|High: $1,602 AUD|Avg: $781 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7$273 AUD
Retailer 9$339 AUD
Retailer 4$568 AUD
Retailer 10$591 AUD
Retailer 3$603 AUD
Retailer 2$615 AUD
Retailer 6$860 AUD
Retailer 5$1,011 AUD
Retailer 8$1,253 AUD
MOH London$1,584 AUD

44 data points across 10 retailers

15 retailers$273 AUD to $1,584 AUD

A
Cheapest Retailer
-
$273 AUD
$192 USD
A
Retailer 2
-
$317 AUD
$223 USD
View
Retailer 3
-
$339 AUD
$238 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$339 AUD
$238 USD
View
A
Retailer 5
-
$568 AUD
€380 EUR
View
B+
Retailer 6
-
$591 AUD
$415 USD
View
A
Retailer 7
-
$603 AUD
£334 GBP
View
A
Retailer 8
-
$615 AUD
£340 GBP
View
A
Retailer 9
-
$673 AUD
$473 USD
View
B+
Retailer 10
-
$860 AUD
$604 USD
View
B+
Retailer 11
-
$1,011 AUD
$710 USD
View
B
Retailer 12
-
$1,089 AUD
$765 USD
View
B+
Retailer 13
-
$1,165 AUD
$818 USD
View
B
Retailer 14
-
$1,253 AUD
$880 USD
View
Most Expensive
B
MOH London
LG816613920 · Nov 1
$1,584 AUD
£876 GBP
View
14 more retailers have this diamond
Prices start from $273 AUDSave up to $1,310 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
1.55ct Round
$273 AUD