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Oval|Lab Grown|IGI

1.51ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG685590864

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG685590864

Diamond specifications and retailer prices

From £204 GBP
$273 USD
As of October 29, 2026
Save £1,610 GBP (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,814 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG685590864 or 685590864. Listed at 16 retailers as of October 29, 2026, with prices from £204 to £1,814, a £1,610 spread on the same certified stone. Do Amore Diamonds lists it at £1,814. 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 angle34.3°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685590864
Dimensions9.18 × 6.36 × 3.96 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.18 mm6.36 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685590864
Side View
Table 62.0%Crown 34.3°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 62.3%

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: £1,814 GBP|Low: £196 GBP|High: £1,814 GBP|Avg: £584 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 10£204 GBP
Retailer 13£237 GBP
Retailer 4£253 GBP
Retailer 11£253 GBP
Retailer 6£312 GBP
Retailer 3£448 GBP
Retailer 2£496 GBP
Retailer 8£513 GBP
Retailer 5£595 GBP
Retailer 9£777 GBP
Retailer 12£898 GBP
Retailer 7£1,125 GBP
Do Amore Diamonds£1,814 GBP

43 data points across 13 retailers

16 retailers£204 GBP to £1,814 GBP

A
Cheapest Retailer
-
£204 GBP
$273 USD
A
Retailer 2
-
£237 GBP
$317 USD
View
A
Retailer 3
-
£253 GBP
$339 USD
View
A
Retailer 4
-
£253 GBP
$339 USD
View
A
Retailer 5
-
£298 GBP
$399 USD
View
A
Retailer 6
-
£312 GBP
View
B+
Retailer 7
-
£337 GBP
$452 USD
View
B+
Retailer 8
-
£369 GBP
$495 USD
View
B+
Retailer 9
-
£448 GBP
$600 USD
View
B+
Retailer 10
-
£496 GBP
View
B+
Retailer 11
-
£513 GBP
A$1,058 AUD
View
B+
Retailer 12
-
£595 GBP
$798 USD
View
B
Retailer 13
-
£777 GBP
$1,041 USD
View
B
Retailer 14
-
£898 GBP
$1,203 USD
View
B
Retailer 15
-
£1,125 GBP
View
Most Expensive
B
Do Amore Diamonds
27-396100D34 · Oct 31
£1,814 GBP
$2,430 USD
View
15 more retailers have this diamond
Prices start from £204 GBPSave up to £1,610 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
£204 GBP