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Cushion|Lab Grown|IGI

1.60ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG612316374

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG612316374

Diamond specifications and retailer prices

From £178 GBP
$239 USD
As of November 1, 2026
Save £1,350 GBP (88%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,528 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG612316374 or 612316374. Listed at 6 retailers as of November 1, 2026, with prices from £178 to £1,528, a £1,350 spread on the same certified stone. Do Amore Diamonds lists it at £1,528. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG612316374
Dimensions6.79 × 6.73 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.79 mm6.73 mm1.60 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG612316374
Side View
Table 57.0%Crown 35.2°Girdle: MED-STKPavilion 39.9°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: Nov 1
Current: £1,528 GBP|Low: £178 GBP|High: £1,528 GBP|Avg: £665 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6£178 GBP
Retailer 4£339 GBP
Retailer 8£363 GBP
Retailer 9£423 GBP
Retailer 7£516 GBP
Retailer 10£518 GBP
Retailer 5£665 GBP
Retailer 2£873 GBP
Retailer 3£902 GBP
Do Amore Diamonds£1,528 GBP

12 data points across 10 retailers

6 retailers£178 GBP to £1,528 GBP

A
Cheapest Retailer
-
£178 GBP
$239 USD
Final sale: no returns
B+
Retailer 2
-
£339 GBP
$455 USD
View
B
Retailer 3
-
£665 GBP
$893 USD
View
B
Retailer 4
-
£873 GBP
View
B
Retailer 5
-
£902 GBP
$1,210 USD
View
Most Expensive
B
Do Amore Diamonds
27-048DC32D1 · Nov 2
£1,528 GBP
$2,050 USD
View
5 more retailers have this diamond
Prices start from £178 GBPSave up to £1,350 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
£178 GBP