Cushion|Lab Grown|IGI

1.00ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG836617854

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG836617854

Diamond specifications and retailer prices

From £334 GBP
$447 USD
As of October 25, 2026
Save £1,331 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,664 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG836617854 or 836617854. Listed at 14 retailers as of October 25, 2026, with prices from £334 to £1,664, a £1,331 spread on the same certified stone. Brilliant Earth lists it at £1,664. 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

1.00
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836617854
Dimensions7.06 × 4.99 × 3.45 mm
L/W Ratio1.41
Girdle conditionFaceted
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
7.06 mm4.99 mm1.00 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836617854
Side View
Table 61.0%Crown 37.1°Girdle: STK-THKPavilion 35.9°Culet: NoneDepth 69.1%

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 25
Current: £1,664 GBP|Low: £334 GBP|High: £1,940 GBP|Avg: £812 GBP|-14.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 12£334 GBP
Retailer 8£345 GBP
Retailer 14£445 GBP
Retailer 11£448 GBP
Retailer 4£535 GBP
Retailer 9£540 GBP
Retailer 10£574 GBP
Retailer 2£602 GBP
Retailer 7£831 GBP
Retailer 5£886 GBP
Retailer 6£996 GBP
Retailer 3£1,103 GBP
Retailer 13£1,306 GBP
Brilliant Earth£1,664 GBP

29 data points across 14 retailers

14 retailers£334 GBP to £1,664 GBP

A
Cheapest Retailer
-
£334 GBP
$447 USD
A
Retailer 2
-
£345 GBP
View
A
Retailer 3
-
£445 GBP
$596 USD
View
A
Retailer 4
-
£448 GBP
$600 USD
View
A
Retailer 5
-
£535 GBP
$717 USD
View
A
Retailer 6
-
£540 GBP
€689 EUR
View
A
Retailer 7
-
£574 GBP
ZAR 12,418 ZAR
View
B+
Retailer 8
-
£602 GBP
View
B+
Retailer 9
-
£831 GBP
$1,114 USD
View
B+
Retailer 10
-
£886 GBP
SGD 1,604 SGD
View
Retailer 11
-
£996 GBP
$1,335 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
£1,103 GBP
$1,478 USD
View
B
Retailer 13
-
£1,306 GBP
View
Most Expensive
B
Brilliant Earth
21640923A · Oct 30
£1,664 GBP
$2,230 USD
View
13 more retailers have this diamond
Prices start from £334 GBPSave up to £1,331 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
1.00ct Cushion
£334 GBP