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Cushion|Lab Grown|IGI

1.70ct J SI1 Cushion Lab Grown Diamond

VG • J/SI1 • IGI LG436045072

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436045072

Diamond specifications and retailer prices

From £1,051 GBP
$1,410 USD
As of November 1, 2026
Save £2,447 GBP (70%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,498 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.7ct lab-grown cushion diamond

This 1.7ct lab-grown cushion sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG436045072 or 436045072. Listed at 5 retailers as of November 1, 2026, with prices from £1,051 to £3,498, a £2,447 spread on the same certified stone. MOH London lists it at £3,498. 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

1.70
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045072
Dimensions6.91 × 6.71 × 4.66 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.91 mm6.71 mm1.70 ctJ / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045072
Side View
Table 59.0%Crown 33.9°Girdle: STK-VTKPavilion 40.6°Culet: NoneDepth 69.4%

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 1
Current: £3,498 GBP|Low: £1,051 GBP|High: £3,545 GBP|Avg: £1,810 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 4£1,051 GBP
Retailer 2£1,089 GBP
Retailer 5£1,218 GBP
Retailer 7£1,274 GBP
Retailer 6£1,513 GBP
Retailer 3£1,725 GBP
Retailer 8£3,117 GBP
MOH London£3,498 GBP

11 data points across 8 retailers

5 retailers£1,051 GBP to £3,498 GBP

A
Cheapest Retailer
-
£1,051 GBP
$1,410 USD
Final sale: no returns
Retailer 2
-
£1,089 GBP
$1,461 USD
View
Price last confirmed 20 days ago
B+
Retailer 3
-
£1,218 GBP
$1,635 USD
View
B+
Retailer 4
-
£1,725 GBP
$2,315 USD
View
Most Expensive
C
MOH London
LG436045072 · Nov 1
£3,498 GBP
View
4 more retailers have this diamond
Prices start from £1,051 GBPSave up to £2,447 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
1.70ct Cushion
£1,051 GBP