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Cushion|Lab Grown|IGI

1.91ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG754576187

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG754576187

Diamond specifications and retailer prices

From £344 GBP
$461 USD
As of October 30, 2026
Save £3,052 GBP (90%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £3,396 GBP at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.91ct lab-grown cushion diamond

This 1.91ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754576187 or 754576187. Listed at 24 retailers as of October 24, 2026, with prices from £344 to £3,396, a £3,052 spread on the same certified stone. Brilliant Earth lists it at £3,396. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754576187
Dimensions8.15 × 6.92 × 4.56 mm
L/W Ratio1.18
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
8.15 mm6.92 mm1.91 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754576187
Side View
Table 59.0%Crown 33.7°Girdle: MED-STKPavilion 37.8°Culet: NoneDepth 65.9%

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: £2,881 GBP|Low: £344 GBP|High: £4,284 GBP|Avg: £1,369 GBP|-30.7%
Brilliant Earth
Retailer 2
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Retailer 21
October 31, 2026
Retailer 5£344 GBP
Retailer 6£381 GBP
Retailer 16£446 GBP
Retailer 4£516 GBP
Retailer 13£549 GBP
Retailer 19£573 GBP
Retailer 15£603 GBP
Retailer 2£697 GBP
Retailer 18£723 GBP
Retailer 17£766 GBP
Retailer 3£925 GBP
Retailer 9£988 GBP
Retailer 11£1,228 GBP
Retailer 12£1,377 GBP
Retailer 7£1,389 GBP
Retailer 21£1,427 GBP
Retailer 8£1,488 GBP
Retailer 10£1,554 GBP
Retailer 14£2,426 GBP
Retailer 20£2,732 GBP
Brilliant Earth£2,881 GBP

30 data points across 21 retailers

24 retailers£344 GBP to £3,396 GBP

A
Cheapest Retailer
-
£344 GBP
$461 USD
Final sale: no returns
A
Retailer 2
-
£381 GBP
$511 USD
View
A
Retailer 3
-
£446 GBP
View
A
Retailer 4
-
£516 GBP
HK$5,400 HKD
View
A
Retailer 5
-
£549 GBP
$735 USD
View
A
Retailer 6
-
£573 GBP
$768 USD
View
A
Retailer 7
-
£603 GBP
$808 USD
View
A
Retailer 8
-
£697 GBP
View
A
Retailer 9
-
£723 GBP
ZAR 15,659 ZAR
View
A
Retailer 10
-
£766 GBP
€978 EUR
View
A
Retailer 11
-
£925 GBP
$1,240 USD
View
Retailer 12
-
£988 GBP
A$2,036 AUD
View
Price last confirmed 11 days ago
Retailer 13
-
£1,228 GBP
View
Price last confirmed 9 days ago
B+
Retailer 14
-
£1,377 GBP
$1,845 USD
View
A
Retailer 15
-
£1,389 GBP
$1,861 USD
View
A
Retailer 16
-
£1,414 GBP
$1,894 USD
View
B+
Retailer 17
-
£1,427 GBP
$1,912 USD
View
B+
Retailer 18
-
£1,488 GBP
SGD 2,695 SGD
View
Retailer 19
-
£1,554 GBP
View
Price last confirmed 10 days ago
Retailer 20
-
£2,426 GBP
$3,250 USD
View
Price last confirmed 26 days ago
B
Retailer 21
-
£2,654 GBP
View
B
Retailer 22
-
£2,732 GBP
$3,660 USD
View
B
Retailer 23
-
£2,881 GBP
$3,860 USD
View
Most Expensive
B
Brilliant Earth
16791955A · Oct 24
£3,396 GBP
$4,550 USD
View
23 more retailers have this diamond
Prices start from £344 GBPSave up to £3,052 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
1.91ct Cushion
£344 GBP