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Cushion|Lab Grown|IGI

1.80ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG799646975

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG799646975

Diamond specifications and retailer prices

From £468 GBP
$627 USD
As of October 31, 2026
Save £2,540 GBP (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,008 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.8ct lab-grown cushion diamond

This 1.8ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799646975 or 799646975. Listed at 19 retailers as of October 31, 2026, with prices from £468 to £3,008, a £2,540 spread on the same certified stone. Brilliant Earth lists it at £3,008. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.80
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799646975
Dimensions6.91 × 6.91 × 4.46 mm
L/W Ratio1.00
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
6.91 mm6.91 mm1.80 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799646975
Side View
Table 61.0%Crown 32.6°Girdle: MED-THKPavilion 35.7°Culet: NoneDepth 64.5%

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 31
Current: £3,008 GBP|Low: £468 GBP|High: £4,299 GBP|Avg: £1,385 GBP|-30.0%
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
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Retailer 17
Retailer 18
November 1, 2026
Retailer 13£468 GBP
Retailer 10£547 GBP
Retailer 2£549 GBP
Retailer 16£601 GBP
Retailer 6£688 GBP
Retailer 7£799 GBP
Retailer 11£803 GBP
Retailer 12£841 GBP
Retailer 15£892 GBP
Retailer 18£1,100 GBP
Retailer 8£1,170 GBP
Retailer 5£1,513 GBP
Retailer 14£1,681 GBP
Retailer 3£1,682 GBP
Retailer 9£1,749 GBP
Retailer 17£2,255 GBP
Retailer 4£2,444 GBP
Brilliant Earth£3,008 GBP

25 data points across 18 retailers

19 retailers£468 GBP to £3,008 GBP

A
Cheapest Retailer
-
£468 GBP
$627 USD
Final sale: no returns
Retailer 2
-
£547 GBP
$733 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£549 GBP
View
A
Retailer 4
-
£601 GBP
$805 USD
View
A
Retailer 5
-
£688 GBP
$922 USD
View
A
Retailer 6
-
£799 GBP
$1,071 USD
View
A
Retailer 7
-
£803 GBP
View
A
Retailer 8
-
£841 GBP
€1,073 EUR
View
A
Retailer 9
-
£892 GBP
ZAR 19,298 ZAR
View
A
Retailer 10
-
£1,100 GBP
$1,474 USD
View
A
Retailer 11
-
£1,170 GBP
$1,568 USD
View
B+
Retailer 12
-
£1,513 GBP
View
B+
Retailer 13
-
£1,681 GBP
$2,252 USD
View
B+
Retailer 14
-
£1,682 GBP
$2,254 USD
View
B+
Retailer 15
-
£1,749 GBP
SGD 3,167 SGD
View
B+
Retailer 16
-
£1,815 GBP
$2,432 USD
View
B+
Retailer 17
-
£2,255 GBP
View
B+
Retailer 18
-
£2,444 GBP
$3,275 USD
View
Most Expensive
B
Brilliant Earth
21420167A · Oct 31
£3,008 GBP
$4,030 USD
View
18 more retailers have this diamond
Prices start from £468 GBPSave up to £2,540 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
1.80ct Cushion
£468 GBP