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Marquise|Lab Grown|IGI

1.01ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • IGI LG512225940

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG512225940

Diamond specifications and retailer prices

From £508 GBP
As of November 4, 2026
Save £451 GBP (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,505 GBP at Friendly Diamonds · As of November 4, 2026
View at Friendly Diamonds

About this 1.01ct lab-grown marquise diamond

This 1.01ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG512225940 or 512225940. Listed at 12 retailers as of November 4, 2026, with a 89% 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

1.01
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.1°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512225940
Dimensions10.22 × 5.26 × 3.01 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.22 mm5.26 mm1.01 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG512225940
Side View
Table 64.5%Crown 38.1°Girdle: STK-THKPavilion 35.7°Culet: NoneDepth 57.2%

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: Nov 4
Current: £1,505 GBP|Low: £487 GBP|High: £2,511 GBP|Avg: £993 GBP
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5£508 GBP
Retailer 9£568 GBP
Retailer 7£589 GBP
Retailer 6£669 GBP
Retailer 4£721 GBP
Retailer 2£931 GBP
Retailer 8£959 GBP
Friendly Diamonds£1,505 GBP
Retailer 3£2,475 GBP

45 data points across 9 retailers

12 retailers£508 GBP to £959 GBP

B
Cheapest Retailer
-
£508 GBP
B
Retailer 2
-
£553 GBP
View
B
Retailer 3
-
£568 GBP
View
Final sale: no returns
Retailer 4
-
£589 GBP
View
Price last confirmed 21 days ago
B
Retailer 5
-
£589 GBP
View
B
Retailer 6
-
£669 GBP
View
B
Retailer 7
-
£721 GBP
View
B
Retailer 8
-
£931 GBP
View
B
Retailer 9
-
£959 GBP
View
Most Expensive
Friendly Diamonds
2233766 · Nov 4
£1,505 GBP
$2,025 USD
View
Price under review
9 more retailers have this diamond
Prices start from £508 GBPSave up to £451 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
1.01ct Marquise
£508 GBP