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Cushion|Lab Grown|IGI

1.99ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840634460

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

Certificate IGI LG840634460

Diamond specifications and retailer prices

From £593 GBP
$795 USD
As of October 31, 2026
Save £2,735 GBP (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,515 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.99ct lab-grown cushion diamond

This 1.99ct 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 LG840634460 or 840634460. Listed at 18 retailers as of October 30, 2026, with a 461% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.99
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634460
Dimensions7.15 × 7.14 × 4.59 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
7.15 mm7.14 mm1.99 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634460
Side View
Table 62.0%Crown 35.3°Girdle: STK-THKPavilion 36.7°Culet: NoneDepth 64.3%

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: £3,515 GBP|Low: £593 GBP|High: £4,120 GBP|Avg: £1,722 GBP
Rare Carat
Retailer 2
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Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 18
October 31, 2026
Retailer 5£593 GBP
Retailer 13£639 GBP
Retailer 18£694 GBP
Retailer 7£760 GBP
Retailer 2£900 GBP
Retailer 17£919 GBP
Retailer 14£1,016 GBP
Retailer 16£1,035 GBP
Retailer 11£1,307 GBP
Retailer 3£1,332 GBP
Retailer 8£1,849 GBP
Retailer 4£1,943 GBP
Retailer 9£2,140 GBP
Retailer 6£2,268 GBP
Retailer 15£2,386 GBP
Retailer 10£3,064 GBP
Retailer 12£3,329 GBP
Rare Carat£3,515 GBP

13 data points across 18 retailers

18 retailers£593 GBP to £3,329 GBP

A
Cheapest Retailer
-
£593 GBP
$795 USD
Final sale: no returns
A
Retailer 2
-
£639 GBP
View
A
Retailer 3
-
£694 GBP
$930 USD
View
A
Retailer 4
-
£760 GBP
$1,018 USD
View
A
Retailer 5
-
£900 GBP
View
A
Retailer 6
-
£919 GBP
$1,231 USD
View
A
Retailer 7
-
£1,016 GBP
€1,296 EUR
View
A
Retailer 8
-
£1,035 GBP
ZAR 22,399 ZAR
View
A
Retailer 9
-
£1,307 GBP
$1,751 USD
View
A
Retailer 10
-
£1,332 GBP
$1,785 USD
View
B+
Retailer 11
-
£1,849 GBP
$2,478 USD
View
B+
Retailer 12
-
£1,943 GBP
$2,604 USD
View
B+
Retailer 13
-
£2,140 GBP
SGD 3,874 SGD
View
B+
Retailer 14
-
£2,268 GBP
$3,039 USD
View
B+
Retailer 15
-
£2,386 GBP
View
B
Retailer 16
-
£3,064 GBP
$4,106 USD
View
B
Retailer 17
-
£3,329 GBP
$4,460 USD
View
Most Expensive
Rare Carat
JH-254684 · Oct 21
£3,515 GBP
$4,710 USD
View
Price last confirmed 10 days ago
17 more retailers have this diamond
Prices start from £593 GBPSave up to £2,735 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
1.99ct Cushion
£593 GBP