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Round|Lab Grown|IGI

1.31ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG499105136

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499105136

Diamond specifications and retailer prices

From $1,226 AUD
As of November 5, 2026
Save $4,092 AUD (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,317 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499105136 or 499105136. Listed at 11 retailers as of November 5, 2026, with prices from $1,226 to $5,317, a $4,092 spread on the same certified stone. MOH London lists it at $5,317. 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

1.31
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499105136
Dimensions6.95 × 6.99 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.95 mm6.99 mm1.31 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499105136
Side View
Table 56.5%Crown 34.2°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.5%

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 5
Current: $5,317 AUD|Low: $1,226 AUD|High: $5,395 AUD|Avg: $2,333 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3$1,226 AUD
Retailer 7$1,371 AUD
Retailer 4$1,400 AUD
Retailer 5$1,423 AUD
Retailer 8$1,671 AUD
Retailer 9$2,180 AUD
Retailer 6$2,288 AUD
Retailer 2$3,270 AUD
MOH London$5,317 AUD

12 data points across 9 retailers

11 retailers$1,226 AUD to $5,317 AUD

A
Cheapest Retailer
-
$1,226 AUD
B+
Retailer 2
-
$1,334 AUD
View
B+
Retailer 3
-
$1,371 AUD
View
Final sale: no returns
B+
Retailer 4
-
$1,400 AUD
View
Retailer 5
-
$1,423 AUD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$1,423 AUD
View
B+
Retailer 7
-
$1,671 AUD
View
B
Retailer 8
-
$2,288 AUD
View
B
Retailer 9
-
$3,270 AUD
View
B
Retailer 10
-
$3,998 AUD
View
Most Expensive
B
MOH London
LG499105136 · Nov 5
$5,317 AUD
£2,931 GBP
View
10 more retailers have this diamond
Prices start from $1,226 AUDSave up to $4,092 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
1.31ct Round
$1,226 AUD