CaratHunter
Plans
Round|Lab Grown|IGI

1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686567

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686567

Diamond specifications and retailer prices

From $286 AUD
$201 USD
As of November 1, 2026
Save $1,375 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,662 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct 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 LG818686567 or 818686567. Listed at 15 retailers as of November 1, 2026, with prices from $286 to $1,662, a $1,375 spread on the same certified stone. MOH London lists it at $1,662. 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

1.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686567
Dimensions7.36 × 7.33 × 4.53 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.36 mm7.33 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686567
Side View
Table 57.0%Crown 34.2°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.7%

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: $1,662 AUD|Low: $286 AUD|High: $1,681 AUD|Avg: $854 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 9$286 AUD
Retailer 11$356 AUD
Retailer 6$592 AUD
Retailer 12$616 AUD
Retailer 2$633 AUD
Retailer 5$645 AUD
Retailer 4$649 AUD
Retailer 7$917 AUD
Retailer 8$1,018 AUD
Retailer 3$1,218 AUD
Retailer 10$1,224 AUD
MOH London$1,662 AUD

43 data points across 12 retailers

15 retailers$286 AUD to $1,662 AUD

A
Cheapest Retailer
-
$286 AUD
$201 USD
A
Retailer 2
-
$332 AUD
$233 USD
View
Retailer 3
-
$356 AUD
$250 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$356 AUD
$250 USD
View
A
Retailer 5
-
$592 AUD
€396 EUR
View
B+
Retailer 6
-
$616 AUD
$433 USD
View
A
Retailer 7
-
$633 AUD
£350 GBP
View
A
Retailer 8
-
$645 AUD
£357 GBP
View
A
Retailer 9
-
$649 AUD
$456 USD
View
B+
Retailer 10
-
$917 AUD
$644 USD
View
B+
Retailer 11
-
$1,018 AUD
$715 USD
View
B+
Retailer 12
-
$1,142 AUD
$802 USD
View
B
Retailer 13
-
$1,218 AUD
$856 USD
View
B
Retailer 14
-
$1,224 AUD
$860 USD
View
Most Expensive
B
MOH London
LG818686567 · Nov 1
$1,662 AUD
£919 GBP
View
14 more retailers have this diamond
Prices start from $286 AUDSave up to $1,375 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
1.51ct Round
$286 AUD