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Oval|Lab Grown|IGI

1.00ct J SI2 Oval Lab Grown Diamond

VG • J/SI2 • IGI LG450027318

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG450027318

Diamond specifications and retailer prices

From £778 GBP
$1,042 USD
As of October 26, 2026
Save £710 GBP (48%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,488 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown oval diamond

This 1ct lab-grown oval sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG450027318 or 450027318. Listed at 5 retailers as of October 26, 2026, with prices from £778 to £1,488, a £710 spread on the same certified stone. MOH London lists it at £1,488. 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

1.00
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
Crown angle39.8°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG450027318
Dimensions7.51 × 5.28 × 3.78 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.51 mm5.28 mm1.00 ctJ / SI2
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateIGI LG450027318
Side View
Table 56.5%Crown 39.8°Girdle: THK-VTKPavilion 41.7°Culet: NoneDepth 71.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: £1,488 GBP|Low: £539 GBP|High: £1,504 GBP|Avg: £970 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 26, 2026
Retailer 9£539 GBP
Retailer 3£749 GBP
Retailer 4£778 GBP
Retailer 5£897 GBP
Retailer 7£911 GBP
Retailer 8£965 GBP
Retailer 2£1,131 GBP
Retailer 6£1,343 GBP
MOH London£1,488 GBP

14 data points across 9 retailers

5 retailers£778 GBP to £1,488 GBP

B
Cheapest Retailer
-
£778 GBP
$1,042 USD
B
Retailer 2
-
£911 GBP
$1,221 USD
View
C
Retailer 3
-
£1,131 GBP
€1,443 EUR
View
Retailer 4
-
£1,343 GBP
$1,800 USD
View
Price last confirmed 17 days ago
Most Expensive
C
MOH London
DD08C7E5F · Oct 26
£1,488 GBP
View
4 more retailers have this diamond
Prices start from £778 GBPSave up to £710 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.

B
1.00ct Oval
£778 GBP