CaratHunter
Plans
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 £140 GBP
$188 USD
As of October 29, 2026
Save £733 GBP (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £873 GBP 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 £140 to £873, a £733 spread on the same certified stone. Brilliant Earth lists it at £873. 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

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: Oct 29
Current: £873 GBP|Low: £140 GBP|High: £884 GBP|Avg: £442 GBP
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£140 GBP
Retailer 7£157 GBP
Retailer 6£163 GBP
Retailer 16£174 GBP
Retailer 17£174 GBP
Retailer 2£194 GBP
Retailer 15£240 GBP
Retailer 11£316 GBP
Retailer 9£328 GBP
Retailer 5£364 GBP
Retailer 3£366 GBP
Retailer 4£560 GBP
Retailer 14£561 GBP
Retailer 8£600 GBP
Retailer 10£694 GBP
Retailer 12£818 GBP
Retailer 18£862 GBP
Brilliant Earth£873 GBP

29 data points across 18 retailers

18 retailers£140 GBP to £873 GBP

A
Cheapest Retailer
-
£140 GBP
$188 USD
A
Retailer 2
-
£157 GBP
$210 USD
View
Final sale: no returns
A
Retailer 3
-
£163 GBP
$218 USD
View
A
Retailer 4
-
£174 GBP
$233 USD
View
A
Retailer 5
-
£174 GBP
$233 USD
View
Retailer 6
-
£182 GBP
$244 USD
View
Price last confirmed 22 days ago
A
Retailer 7
-
£194 GBP
View
B+
Retailer 8
-
£240 GBP
$322 USD
View
A
Retailer 9
-
£316 GBP
View
A
Retailer 10
-
£364 GBP
$488 USD
View
A
Retailer 11
-
£366 GBP
$491 USD
View
B+
Retailer 12
-
£560 GBP
$750 USD
View
B
Retailer 13
-
£561 GBP
$752 USD
View
B+
Retailer 14
-
£600 GBP
$804 USD
View
Retailer 15
-
£694 GBP
$930 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
£818 GBP
View
B
Retailer 17
-
£862 GBP
$1,156 USD
View
Most Expensive
B
Brilliant Earth
21155010A · Oct 29
£873 GBP
$1,170 USD
View
17 more retailers have this diamond
Prices start from £140 GBPSave up to £733 GBP

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
£140 GBP