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Round|Lab Grown|IGI

1.31ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG761528295

Shape and cutting style on the report: Round brilliant

Certificate IGI LG761528295

Diamond specifications and retailer prices

From £147 GBP
As of November 5, 2026
Save £735 GBP (83%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £882 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG761528295 or 761528295. Listed at 23 retailers as of November 5, 2026, with prices from £147 to £882, a £735 spread on the same certified stone. Reve Diamonds lists it at £882. 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

1.31
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG761528295
Dimensions6.98 × 6.95 × 4.35 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.98 mm6.95 mm1.31 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG761528295
Side View
Table 58.0%Crown 35.4°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.4%

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: Nov 5
Current: £320 GBP|Low: £140 GBP|High: £882 GBP|Avg: £383 GBP|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Reve Diamonds
November 6, 2026
Retailer 9£147 GBP
Retailer 4£164 GBP
Retailer 18£170 GBP
Retailer 5£182 GBP
Retailer 6£182 GBP
Retailer 7£317 GBP
Retailer 11£317 GBP
Retailer 1£320 GBP
Retailer 2£322 GBP
Retailer 12£329 GBP
Retailer 3£367 GBP
Retailer 17£400 GBP
Retailer 15£401 GBP
Retailer 13£490 GBP
Retailer 16£497 GBP
Retailer 10£585 GBP
Retailer 8£626 GBP
Retailer 14£850 GBP
Reve Diamonds£882 GBP

38 data points across 19 retailers

23 retailers£147 GBP to £882 GBP

Retailer 1
-
£146 GBP
Price last confirmed 46 days ago
A
Retailer 2
-
£147 GBP
View
A
Retailer 3
-
£164 GBP
View
Final sale: no returns
A
Retailer 4
-
£170 GBP
View
Retailer 5
-
£178 GBP
View
Price last confirmed 46 days ago
A
Retailer 6
-
£182 GBP
View
Retailer 7
-
£182 GBP
View
Price last confirmed 12 days ago
A
Retailer 8
-
£317 GBP
View
A
Retailer 9
-
£317 GBP
View
A
Retailer 10
-
£320 GBP
View
A
Retailer 11
-
£322 GBP
View
A
Retailer 12
-
£329 GBP
View
B+
Retailer 13
-
£367 GBP
View
B+
Retailer 14
-
£400 GBP
View
B+
Retailer 15
-
£401 GBP
View
B+
Retailer 16
-
£490 GBP
View
B+
Retailer 17
-
£490 GBP
View
B+
Retailer 18
-
£497 GBP
View
Retailer 19
-
£581 GBP
View
Price last confirmed 46 days ago
B+
Retailer 20
-
£585 GBP
View
B
Retailer 21
-
£626 GBP
View
B
Retailer 22
-
£850 GBP
View
Most Expensive
B
Reve Diamonds
EAB8DE9AA · Nov 6
£882 GBP
$1,187 USD
View
22 more retailers have this diamond
Prices start from £147 GBPSave up to £735 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
1.31ct Round
£147 GBP