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Round|Lab Grown|IGI

1.58ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG825658780

Shape and cutting style on the report: Round brilliant

Certificate IGI LG825658780

Diamond specifications and retailer prices

From $285 AUD
$200 USD
As of November 1, 2026
Save $1,373 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,658 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.58ct lab-grown round diamond

This 1.58ct 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 LG825658780 or 825658780. Listed at 14 retailers as of October 29, 2026, with prices from $285 to $1,658, a $1,373 spread on the same certified stone. MOH London lists it at $1,658. 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

1.58
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825658780
Dimensions7.53 × 7.47 × 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
7.53 mm7.47 mm1.58 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825658780
Side View
Table 57.0%Crown 35.2°Girdle: THN-MEDPavilion 40.5°Culet: NoneDepth 61.1%

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: $1,658 AUD|Low: $285 AUD|High: $1,669 AUD|Avg: $873 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
November 1, 2026
Retailer 7$285 AUD
Retailer 9$353 AUD
Retailer 4$589 AUD
Retailer 10$614 AUD
Retailer 2$639 AUD
Retailer 11$699 AUD
Retailer 6$911 AUD
Retailer 5$1,018 AUD
Retailer 3$1,210 AUD
Retailer 8$1,281 AUD
MOH London$1,658 AUD

43 data points across 11 retailers

14 retailers$285 AUD to $1,658 AUD

A
Cheapest Retailer
-
$285 AUD
$200 USD
A
Retailer 2
-
$330 AUD
$232 USD
View
Retailer 3
-
$353 AUD
$248 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$353 AUD
$248 USD
View
A
Retailer 5
-
$589 AUD
€394 EUR
View
B+
Retailer 6
-
$614 AUD
$431 USD
View
A
Retailer 7
-
$639 AUD
£354 GBP
View
A
Retailer 8
-
$699 AUD
$491 USD
View
B+
Retailer 9
-
$911 AUD
$640 USD
View
B+
Retailer 10
-
$1,018 AUD
$715 USD
View
B+
Retailer 11
-
$1,133 AUD
$796 USD
View
B
Retailer 12
-
$1,210 AUD
$850 USD
View
B
Retailer 13
-
$1,281 AUD
$900 USD
View
Most Expensive
B
MOH London
LG825658780 · Oct 29
$1,658 AUD
£917 GBP
View
13 more retailers have this diamond
Prices start from $285 AUDSave up to $1,373 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
1.58ct Round
$285 AUD