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Oval|Lab Grown|IGI

1.51ct E SI1 Oval Lab Grown Diamond

VG • E/SI1 • IGI LG837666625

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG837666625

Diamond specifications and retailer prices

From £241 GBP
As of November 6, 2026
Save £365 GBP (60%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £687 GBP at Rare Carat · As of October 18, 2026
View at Rare Carat

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 E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG837666625 or 837666625. Listed at 6 retailers as of November 6, 2026, with a 152% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle29.4°
Pavilion angle41.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837666625
Dimensions10.06 × 6.11 × 3.77 mm
L/W Ratio1.65
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.06 mm6.11 mm1.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837666625
Side View
Table 65.0%Crown 29.4°Girdle: STK-THKPavilion 41.8°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
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: Nov 6
Current: £687 GBP|Low: £241 GBP|High: £687 GBP|Avg: £421 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£241 GBP
Retailer 3£299 GBP
Retailer 5£321 GBP
Retailer 2£337 GBP
Retailer 4£605 GBP
Rare Carat£687 GBP

20 data points across 6 retailers

6 retailers£241 GBP to £605 GBP

B+
Cheapest Retailer
-
£241 GBP
A
Retailer 2
-
£299 GBP
View
A
Retailer 3
-
£321 GBP
View
B+
Retailer 4
-
£337 GBP
View
B+
Retailer 5
-
£605 GBP
View
Most Expensive
Rare Carat
42A837666625 · Oct 18
£687 GBP
$920 USD
View
Price last confirmed 18 days ago
5 more retailers have this diamond
Prices start from £241 GBPSave up to £365 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
£241 GBP