Cushion|Lab Grown|IGI

1.91ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG800614356

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG800614356

Diamond specifications and retailer prices

From £554 GBP
$742 USD
As of November 1, 2026
Save £861 GBP (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,762 GBP at Brilliant Earth · As of September 23, 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 LG800614356 or 800614356. Listed at 6 retailers as of October 29, 2026, with a 156% 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

1.91
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle32.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800614356
Dimensions8.32 × 6.30 × 4.32 mm
L/W Ratio1.32
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
8.32 mm6.30 mm1.91 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800614356
Side View
Table 63.0%Crown 33.5°Girdle: STK-VTKPavilion 32.2°Culet: NoneDepth 68.6%

Caratlytics Score

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A+
Exceptional
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: £3,762 GBP|Low: £543 GBP|High: £3,762 GBP|Avg: £1,624 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 4£554 GBP
Retailer 5£572 GBP
Retailer 2£881 GBP
Retailer 8£1,014 GBP
Retailer 3£1,415 GBP
Retailer 7£2,097 GBP
Retailer 9£2,123 GBP
Retailer 6£2,377 GBP
Brilliant Earth£3,762 GBP

25 data points across 9 retailers

6 retailers£554 GBP to £1,415 GBP

A+
Cheapest Retailer
-
£554 GBP
$742 USD
A
Retailer 2
-
£572 GBP
$766 USD
View
A
Retailer 3
-
£881 GBP
$1,181 USD
View
A
Retailer 4
-
£1,415 GBP
View
Retailer 5
-
£2,377 GBP
$3,185 USD
View
Price last confirmed 10 days ago
Most Expensive
Brilliant Earth
20189324A · Sep 23
£3,762 GBP
$5,040 USD
View
Price last confirmed 38 days ago
5 more retailers have this diamond
Prices start from £554 GBPSave up to £861 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
£554 GBP