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Oval|Lab Grown|IGI

1.00ct D SI1 Oval Lab Grown Diamond

EX • D/SI1 • IGI LG559282840

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG559282840

Diamond specifications and retailer prices

From £111 GBP
$149 USD
As of October 29, 2026
Save £534 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £645 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG559282840 or 559282840. Listed at 13 retailers as of October 26, 2026, with prices from £111 to £645, a £534 spread on the same certified stone. MOH London lists it at £645. 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

1.00
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG559282840
Dimensions7.97 × 5.82 × 3.51 mm
L/W Ratio1.37
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.97 mm5.82 mm1.00 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG559282840
Side View
Table 63.5%Crown 34.2°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 60.3%

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: Oct 29
Current: £645 GBP|Low: £107 GBP|High: £653 GBP|Avg: £279 GBP|-1.0%
MOH London
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 30, 2026
Retailer 9£111 GBP
Retailer 3£129 GBP
Retailer 10£138 GBP
Retailer 13£138 GBP
Retailer 2£166 GBP
Retailer 5£236 GBP
Retailer 6£239 GBP
Retailer 11£253 GBP
Retailer 4£375 GBP
Retailer 7£381 GBP
Retailer 12£443 GBP
Retailer 8£469 GBP
MOH London£645 GBP

40 data points across 13 retailers

13 retailers£111 GBP to £645 GBP

A
Cheapest Retailer
-
£111 GBP
$149 USD
A
Retailer 2
-
£129 GBP
$173 USD
View
A
Retailer 3
-
£138 GBP
$185 USD
View
A
Retailer 4
-
£138 GBP
$185 USD
View
A
Retailer 5
-
£166 GBP
View
A
Retailer 6
-
£236 GBP
$316 USD
View
A
Retailer 7
-
£239 GBP
View
A
Retailer 8
-
£253 GBP
$339 USD
View
B+
Retailer 9
-
£375 GBP
$503 USD
View
B+
Retailer 10
-
£381 GBP
$510 USD
View
B+
Retailer 11
-
£443 GBP
$594 USD
View
B
Retailer 12
-
£469 GBP
$628 USD
View
Most Expensive
B
MOH London
LG559282840 · Oct 26
£645 GBP
View
12 more retailers have this diamond
Prices start from £111 GBPSave up to £534 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
1.00ct Oval
£111 GBP