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Cushion|Lab Grown|IGI

1.31ct G SI1 Cushion Lab Grown Diamond

GD • G/SI1 • IGI LG625480540

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG625480540

Diamond specifications and retailer prices

From £261 GBP
As of November 6, 2026
Save £949 GBP (78%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,210 GBP at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

About this 1.31ct lab-grown cushion diamond

This 1.31ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG625480540 or 625480540. Listed at 7 retailers as of November 6, 2026, with prices from £261 to £1,210, a £949 spread on the same certified stone. Do Amore Diamonds lists it at £1,210. 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

1.31
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG625480540
Dimensions6.40 × 6.39 × 4.24 mm
L/W Ratio1.00
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
6.40 mm6.39 mm1.31 ctG / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG625480540
Side View
Table 60.0%Crown 34.3°Girdle: MED-THKPavilion 40.4°Culet: NoneDepth 66.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,210 GBP|Low: £261 GBP|High: £1,210 GBP|Avg: £525 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 7£261 GBP
Retailer 5£280 GBP
Retailer 2£309 GBP
Retailer 6£345 GBP
Retailer 4£467 GBP
Retailer 3£804 GBP
Do Amore Diamonds£1,210 GBP

43 data points across 7 retailers

7 retailers£261 GBP to £1,210 GBP

B+
Cheapest Retailer
-
£261 GBP
B
Retailer 2
-
£280 GBP
View
B+
Retailer 3
-
£309 GBP
View
B+
Retailer 4
-
£345 GBP
View
B+
Retailer 5
-
£467 GBP
View
B
Retailer 6
-
£804 GBP
View
Most Expensive
C
Do Amore Diamonds
27-E53E6D30B · Nov 6
£1,210 GBP
$1,620 USD
View
6 more retailers have this diamond
Prices start from £261 GBPSave up to £949 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+
1.31ct Cushion
£261 GBP