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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG541253650

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG541253650

Diamond specifications and retailer prices

From £189 GBP
As of November 6, 2026
Save £766 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £955 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG541253650 or 541253650. Listed at 13 retailers as of November 6, 2026, with prices from £189 to £955, a £766 spread on the same certified stone. Reve Diamonds lists it at £955. 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

1.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG541253650
Dimensions8.09 × 5.78 × 3.97 mm
L/W Ratio1.40
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
8.09 mm5.78 mm1.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG541253650
Side View
Table 61.0%Crown 32.8°Girdle: MED-THKPavilion 37.9°Culet: NoneDepth 68.7%

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: Nov 6
Current: £445 GBP|Low: £188 GBP|High: £955 GBP|Avg: £431 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 7, 2026
Retailer 3£189 GBP
Retailer 4£210 GBP
Retailer 6£268 GBP
Retailer 11£282 GBP
Retailer 8£335 GBP
Retailer 2£346 GBP
Retailer 7£387 GBP
Retailer 10£398 GBP
Retailer 1£445 GBP
Retailer 12£713 GBP
Retailer 5£757 GBP
Retailer 9£838 GBP
Reve Diamonds£955 GBP

40 data points across 13 retailers

13 retailers£189 GBP to £955 GBP

A
Cheapest Retailer
-
£189 GBP
Final sale: no returns
A
Retailer 2
-
£210 GBP
View
A
Retailer 3
-
£268 GBP
View
B+
Retailer 4
-
£282 GBP
View
A
Retailer 5
-
£335 GBP
View
B+
Retailer 6
-
£346 GBP
View
B+
Retailer 7
-
£387 GBP
View
B+
Retailer 8
-
£398 GBP
View
B+
Retailer 9
-
£445 GBP
View
B
Retailer 10
-
£713 GBP
View
B
Retailer 11
-
£757 GBP
View
B
Retailer 12
-
£838 GBP
View
Most Expensive
B
Reve Diamonds
1DAE62A6A · Nov 6
£955 GBP
$1,278 USD
View
12 more retailers have this diamond
Prices start from £189 GBPSave up to £766 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
1.51ct Cushion
£189 GBP