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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG570349113

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG570349113

Diamond specifications and retailer prices

From £185 GBP
$248 USD
As of October 30, 2026
Save £1,397 GBP (88%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,582 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.59ct lab-grown cushion diamond

This 1.59ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG570349113 or 570349113. Listed at 6 retailers as of October 30, 2026, with prices from £185 to £1,582, a £1,397 spread on the same certified stone. Do Amore Diamonds lists it at £1,582. 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

1.59
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG570349113
Dimensions6.69 × 6.61 × 4.46 mm
L/W Ratio1.01
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
6.69 mm6.61 mm1.59 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG570349113
Side View
Table 64.5%Crown 36.2°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 67.5%

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: Oct 30
Current: £1,582 GBP|Low: £115 GBP|High: £1,582 GBP|Avg: £704 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 6£185 GBP
Retailer 4£349 GBP
Retailer 9£394 GBP
Retailer 8£437 GBP
Retailer 10£439 GBP
Retailer 11£540 GBP
Retailer 3£812 GBP
Retailer 2£910 GBP
Retailer 5£925 GBP
Retailer 7£1,127 GBP
Do Amore Diamonds£1,582 GBP

12 data points across 11 retailers

6 retailers£185 GBP to £1,582 GBP

A
Cheapest Retailer
-
£185 GBP
$248 USD
Final sale: no returns
B
Retailer 2
-
£349 GBP
$468 USD
View
B
Retailer 3
-
£910 GBP
View
B
Retailer 4
-
£925 GBP
$1,240 USD
View
B
Retailer 5
-
£1,127 GBP
$1,510 USD
View
Most Expensive
C
Do Amore Diamonds
27-41238D730 · Oct 31
£1,582 GBP
$2,120 USD
View
5 more retailers have this diamond
Prices start from £185 GBPSave up to £1,397 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
1.59ct Cushion
£185 GBP