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Oval|Lab Grown|IGI

1.51ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG830676748

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG830676748

Diamond specifications and retailer prices

From $268 AUD
$188 USD
As of October 29, 2026
Save $1,398 AUD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,666 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.51ct lab-grown oval diamond

This 1.51ct lab-grown oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG830676748 or 830676748. Listed at 18 retailers as of October 29, 2026, with prices from $268 to $1,666, a $1,398 spread on the same certified stone. Brilliant Earth lists it at $1,666. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830676748
Dimensions9.73 × 6.44 × 3.99 mm
L/W Ratio1.51
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.73 mm6.44 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830676748
Side View
Table 59.0%Crown 32.8°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.0%

Caratlytics Score

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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 29
Current: $1,666 AUD|Low: $268 AUD|High: $1,685 AUD|Avg: $842 AUD
Brilliant Earth
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
Retailer 18
October 31, 2026
Retailer 13$268 AUD
Retailer 7$299 AUD
Retailer 6$310 AUD
Retailer 16$332 AUD
Retailer 17$332 AUD
Retailer 11$371 AUD
Retailer 15$458 AUD
Retailer 2$602 AUD
Retailer 9$625 AUD
Retailer 5$695 AUD
Retailer 3$699 AUD
Retailer 4$1,068 AUD
Retailer 14$1,071 AUD
Retailer 8$1,144 AUD
Retailer 10$1,324 AUD
Retailer 12$1,560 AUD
Retailer 18$1,645 AUD
Brilliant Earth$1,666 AUD

30 data points across 18 retailers

18 retailers$268 AUD to $1,666 AUD

A
Cheapest Retailer
-
$268 AUD
$188 USD
A
Retailer 2
-
$299 AUD
$210 USD
View
Final sale: no returns
A
Retailer 3
-
$310 AUD
$218 USD
View
A
Retailer 4
-
$332 AUD
$233 USD
View
A
Retailer 5
-
$332 AUD
$233 USD
View
Retailer 6
-
$347 AUD
$244 USD
View
Price last confirmed 23 days ago
A
Retailer 7
-
$371 AUD
£205 GBP
View
B+
Retailer 8
-
$458 AUD
$322 USD
View
A
Retailer 9
-
$602 AUD
£333 GBP
View
A
Retailer 10
-
$695 AUD
$488 USD
View
A
Retailer 11
-
$699 AUD
$491 USD
View
B+
Retailer 12
-
$1,068 AUD
$750 USD
View
B
Retailer 13
-
$1,071 AUD
$752 USD
View
B+
Retailer 14
-
$1,144 AUD
$804 USD
View
Retailer 15
-
$1,324 AUD
$930 USD
View
Price last confirmed 12 days ago
B
Retailer 16
-
$1,560 AUD
£863 GBP
View
B
Retailer 17
-
$1,645 AUD
$1,156 USD
View
Most Expensive
B
Brilliant Earth
21155010A · Oct 29
$1,666 AUD
$1,170 USD
View
17 more retailers have this diamond
Prices start from $268 AUDSave up to $1,398 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 Oval
$268 AUD