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Radiant|Lab Grown|IGI

1.56ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG512224126

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG512224126

Diamond specifications and retailer prices

From $1,424 AUD
$1,000 USD
As of October 31, 2026
Save $5,593 AUD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $7,017 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.56ct lab-grown radiant diamond

This 1.56ct lab-grown radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512224126 or 512224126. Listed at 10 retailers as of October 31, 2026, with prices from $1,424 to $7,017, a $5,593 spread on the same certified stone. MOH London lists it at $7,017. 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

1.56
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512224126
Dimensions7.91 × 6.11 × 3.93 mm
L/W Ratio1.29
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.91 mm6.11 mm1.56 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512224126
Side View
Table 66.5%Crown 38.1°Girdle: Slightly ThickPavilion 35.6°Culet: NoneDepth 64.3%

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: Oct 31
Current: $7,017 AUD|Low: $1,424 AUD|High: $7,111 AUD|Avg: $3,597 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 2$1,424 AUD
Retailer 3$2,118 AUD
Retailer 4$2,457 AUD
Retailer 6$2,698 AUD
Retailer 8$3,331 AUD
Retailer 5$3,871 AUD
Retailer 7$4,459 AUD
MOH London$7,017 AUD

14 data points across 8 retailers

10 retailers$1,424 AUD to $7,017 AUD

A
Cheapest Retailer
-
$1,424 AUD
$1,000 USD
B+
Retailer 2
-
$2,118 AUD
$1,488 USD
View
B+
Retailer 3
-
$2,305 AUD
$1,619 USD
View
Retailer 4
-
$2,457 AUD
$1,726 USD
View
Price last confirmed 20 days ago
B+
Retailer 5
-
$2,457 AUD
$1,726 USD
View
B+
Retailer 6
-
$2,698 AUD
$1,895 USD
View
B
Retailer 7
-
$3,871 AUD
$2,719 USD
View
B
Retailer 8
-
$4,459 AUD
$3,132 USD
View
B
Retailer 9
-
$4,605 AUD
$3,235 USD
View
Most Expensive
B
MOH London
LG512224126 · Nov 1
$7,017 AUD
£3,881 GBP
View
9 more retailers have this diamond
Prices start from $1,424 AUDSave up to $5,593 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
1.56ct Radiant
$1,424 AUD