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Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG778688204

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778688204

Diamond specifications and retailer prices

From $330 AUD
As of November 6, 2026
Save $1,096 AUD (77%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,739 AUD at MOH London · As of October 26, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778688204 or 778688204. Listed at 18 retailers as of November 5, 2026, with a 332% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778688204
Dimensions7.29 × 7.34 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.29 mm7.34 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778688204
Side View
Table 58.0%Crown 35.9°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.2%

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 6
Current: $1,739 AUD|Low: $288 AUD|High: $1,863 AUD|Avg: $855 AUD|+14.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 6$300 AUD
Retailer 14$330 AUD
Retailer 9$348 AUD
Retailer 5$409 AUD
Retailer 2$598 AUD
Retailer 15$636 AUD
Retailer 16$640 AUD
Retailer 11$662 AUD
Retailer 10$671 AUD
Retailer 8$744 AUD
Retailer 17$792 AUD
Retailer 3$1,121 AUD
Retailer 12$1,185 AUD
Retailer 4$1,192 AUD
Retailer 7$1,195 AUD
Retailer 13$1,426 AUD
MOH London$1,739 AUD

43 data points across 17 retailers

18 retailers$330 AUD to $1,426 AUD

Retailer 1
-
$300 AUD
Price last confirmed 11 days ago
A
Retailer 2
-
$330 AUD
View
Final sale: no returns
Retailer 3
-
$348 AUD
View
Price last confirmed 10 days ago
Retailer 4
-
$371 AUD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$409 AUD
View
A
Retailer 6
-
$598 AUD
View
B+
Retailer 7
-
$636 AUD
View
A
Retailer 8
-
$640 AUD
View
A
Retailer 9
-
$662 AUD
View
A
Retailer 10
-
$671 AUD
View
Retailer 11
-
$744 AUD
View
Price last confirmed 11 days ago
A
Retailer 12
-
$792 AUD
View
Retailer 13
-
$1,121 AUD
View
Price last confirmed 9 days ago
B
Retailer 14
-
$1,185 AUD
View
B+
Retailer 15
-
$1,192 AUD
View
Retailer 16
-
$1,195 AUD
View
Price last confirmed 13 days ago
B
Retailer 17
-
$1,426 AUD
View
Most Expensive
MOH London
LG778688204 · Oct 26
$1,739 AUD
£941 GBP
View
Price last confirmed 10 days ago
17 more retailers have this diamond
Prices start from $330 AUDSave up to $1,096 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
$330 AUD