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Cushion|Lab Grown|IGI

1.71ct D SI2 Cushion Lab Grown Diamond

GD • D/SI2 • IGI LG478104336

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG478104336

Diamond specifications and retailer prices

From £197 GBP
As of November 6, 2026
Save £983 GBP (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,180 GBP at MOH London · As of November 7, 2026
View at MOH London

About this 1.71ct lab-grown cushion diamond

This 1.71ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI LG478104336 or 478104336. Listed at 9 retailers as of November 6, 2026, with prices from £197 to £1,180, a £983 spread on the same certified stone. MOH London lists it at £1,180. 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

1.71
Carat
D
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478104336
Dimensions7.90 × 6.45 × 4.42 mm
L/W Ratio1.22
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
7.90 mm6.45 mm1.71 ctD / SI2
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478104336
Side View
Table 59.5%Crown 32.5°Girdle: MED-STKPavilion 38.4°Culet: NoneDepth 68.5%

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: £1,180 GBP|Low: £197 GBP|High: £1,189 GBP|Avg: £576 GBP|+22.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 8£197 GBP
Retailer 3£268 GBP
Retailer 4£324 GBP
Retailer 5£421 GBP
Retailer 2£523 GBP
Retailer 7£718 GBP
Retailer 6£1,099 GBP
MOH London£1,180 GBP

41 data points across 8 retailers

9 retailers£197 GBP to £1,180 GBP

A
Cheapest Retailer
-
£197 GBP
Final sale: no returns
B+
Retailer 2
-
£268 GBP
View
B+
Retailer 3
-
£324 GBP
View
B+
Retailer 4
-
£421 GBP
View
B+
Retailer 5
-
£523 GBP
View
B
Retailer 6
-
£718 GBP
View
B
Retailer 7
-
£724 GBP
View
B
Retailer 8
-
£1,099 GBP
View
Most Expensive
C
MOH London
LG478104336 · Nov 7
£1,180 GBP
View
8 more retailers have this diamond
Prices start from £197 GBPSave up to £983 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
1.71ct Cushion
£197 GBP