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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 $334 NZD
$188 USD
As of October 29, 2026
Save $1,742 NZD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,076 NZD at Brilliant Earth · As of October 31, 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 19 retailers as of October 29, 2026, with prices from $334 to $2,076, a $1,742 spread on the same certified stone. Brilliant Earth lists it at $2,076. 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: $2,076 NZD|Low: $334 NZD|High: $2,076 NZD|Avg: $1,035 NZD
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
November 1, 2026
Retailer 14$334 NZD
Retailer 8$373 NZD
Retailer 7$387 NZD
Retailer 17$413 NZD
Retailer 18$413 NZD
Retailer 12$462 NZD
Retailer 16$571 NZD
Retailer 11$723 NZD
Retailer 2$745 NZD
Retailer 6$866 NZD
Retailer 4$871 NZD
Retailer 5$1,331 NZD
Retailer 15$1,334 NZD
Retailer 9$1,426 NZD
Retailer 10$1,650 NZD
Retailer 13$1,945 NZD
Retailer 3$2,050 NZD
Brilliant Earth$2,076 NZD

31 data points across 18 retailers

19 retailers$334 NZD to $2,076 NZD

A
Cheapest Retailer
-
$334 NZD
$188 USD
A
Retailer 2
-
$373 NZD
$210 USD
View
Final sale: no returns
A
Retailer 3
-
$387 NZD
$218 USD
View
A
Retailer 4
-
$413 NZD
$233 USD
View
A
Retailer 5
-
$413 NZD
$233 USD
View
Retailer 6
-
$433 NZD
$244 USD
View
Price last confirmed 24 days ago
A
Retailer 7
-
$462 NZD
£205 GBP
View
B+
Retailer 8
-
$571 NZD
$322 USD
View
A
Retailer 9
-
$723 NZD
€388 EUR
View
A
Retailer 10
-
$745 NZD
£330 GBP
View
A
Retailer 11
-
$866 NZD
$488 USD
View
A
Retailer 12
-
$871 NZD
$491 USD
View
B+
Retailer 13
-
$1,331 NZD
$750 USD
View
B
Retailer 14
-
$1,334 NZD
$752 USD
View
B+
Retailer 15
-
$1,426 NZD
$804 USD
View
Retailer 16
-
$1,650 NZD
$930 USD
View
Price last confirmed 13 days ago
B
Retailer 17
-
$1,945 NZD
£863 GBP
View
B
Retailer 18
-
$2,050 NZD
$1,156 USD
View
Most Expensive
B
Brilliant Earth
21155010A · Oct 31
$2,076 NZD
$1,170 USD
View
18 more retailers have this diamond
Prices start from $334 NZDSave up to $1,742 NZD

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
$334 NZD