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Cushion|Lab Grown|IGI

1.60ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG539232875

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG539232875

Diamond specifications and retailer prices

From £164 GBP
$220 USD
As of October 30, 2026
Save £911 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,075 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.6ct lab-grown cushion diamond

This 1.6ct 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 top-tier cut grade and certified by IGI LG539232875 or 539232875. Listed at 15 retailers as of October 29, 2026, with prices from £164 to £1,075, a £911 spread on the same certified stone. Brilliant Earth lists it at £1,075. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.60
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle31.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG539232875
Dimensions7.90 × 5.95 × 3.93 mm
L/W Ratio1.33
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 mm5.95 mm1.60 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG539232875
Side View
Table 60.0%Crown 38.6°Girdle: THK-VTKPavilion 31.2°Culet: NoneDepth 66.1%

Caratlytics Score

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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: £1,075 GBP|Low: £164 GBP|High: £1,134 GBP|Avg: £467 GBP|-5.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 3£164 GBP
Retailer 11£182 GBP
Retailer 7£204 GBP
Retailer 8£246 GBP
Retailer 2£299 GBP
Retailer 5£334 GBP
Retailer 4£368 GBP
Retailer 12£433 GBP
Retailer 6£440 GBP
Retailer 10£780 GBP
Retailer 9£854 GBP
Brilliant Earth£1,075 GBP

44 data points across 12 retailers

15 retailers£164 GBP to £1,075 GBP

A
Cheapest Retailer
-
£164 GBP
$220 USD
Final sale: no returns
A
Retailer 2
-
£182 GBP
$244 USD
View
A
Retailer 3
-
£204 GBP
View
B+
Retailer 4
-
£246 GBP
$330 USD
View
A
Retailer 5
-
£299 GBP
€381 EUR
View
A
Retailer 6
-
£334 GBP
View
A
Retailer 7
-
£368 GBP
$493 USD
View
A
Retailer 8
-
£404 GBP
$541 USD
View
B+
Retailer 9
-
£433 GBP
$580 USD
View
A
Retailer 10
-
£440 GBP
$589 USD
View
B+
Retailer 11
-
£626 GBP
$839 USD
View
Retailer 12
-
£780 GBP
$1,045 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
£854 GBP
View
B
Retailer 14
-
£884 GBP
$1,184 USD
View
Most Expensive
B
Brilliant Earth
10789185A · Oct 29
£1,075 GBP
$1,440 USD
View
14 more retailers have this diamond
Prices start from £164 GBPSave up to £911 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
1.60ct Cushion
£164 GBP