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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 $188 USD
As of October 29, 2026
Save $982 USD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,170 USD 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 $188 to $1,170, a $982 spread on the same certified stone. Brilliant Earth lists it at $1,170. 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
Color
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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Price History

Last verified: Oct 29
Current: $1,170 USD|Low: $188 USD|High: $1,184 USD|Avg: $592 USD
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 30, 2026
Retailer 13$188 USD
Retailer 7$210 USD
Retailer 6$218 USD
Retailer 16$233 USD
Retailer 17$233 USD
Retailer 2$260 USD
Retailer 15$322 USD
Retailer 11$423 USD
Retailer 9$439 USD
Retailer 5$488 USD
Retailer 3$491 USD
Retailer 4$750 USD
Retailer 14$752 USD
Retailer 8$804 USD
Retailer 10$930 USD
Retailer 12$1,096 USD
Retailer 18$1,156 USD
Brilliant Earth$1,170 USD

29 data points across 18 retailers

18 retailers$188 USD to $1,170 USD

A
Cheapest Retailer
-
$188 USD
A
Retailer 2
-
$210 USD
View
Final sale: no returns
A
Retailer 3
-
$218 USD
View
A
Retailer 4
-
$233 USD
View
A
Retailer 5
-
$233 USD
View
Retailer 6
-
$244 USD
View
Price last confirmed 22 days ago
A
Retailer 7
-
$260 USD
£205 GBP
View
B+
Retailer 8
-
$322 USD
View
A
Retailer 9
-
$423 USD
£333 GBP
View
A
Retailer 10
-
$488 USD
View
A
Retailer 11
-
$491 USD
View
B+
Retailer 12
-
$750 USD
View
B
Retailer 13
-
$752 USD
View
B+
Retailer 14
-
$804 USD
View
Retailer 15
-
$930 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$1,096 USD
£863 GBP
View
B
Retailer 17
-
$1,156 USD
View
Most Expensive
B
Brilliant Earth
21155010A · Oct 29
$1,170 USD
View
17 more retailers have this diamond
Prices start from $188 USDSave up to $982 USD

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
$188 USD