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Cushion|Lab Grown|IGI

1.74ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG831604085

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG831604085

Diamond specifications and retailer prices

From £570 GBP
$764 USD
As of October 31, 2026
Save £3,602 GBP (86%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,172 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.74ct lab-grown cushion diamond

This 1.74ct 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 LG831604085 or 831604085. Listed at 16 retailers as of October 29, 2026, with prices from £570 to £4,172, a £3,602 spread on the same certified stone. Brilliant Earth lists it at £4,172. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.74
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831604085
Dimensions8.24 × 6.58 × 4.14 mm
L/W Ratio1.25
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
8.24 mm6.58 mm1.74 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831604085
Side View
Table 58.0%Crown 33.2°Girdle: MED-STKPavilion 36.4°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £4,172 GBP|Low: £570 GBP|High: £4,172 GBP|Avg: £1,569 GBP
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
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Retailer 15
Retailer 16
October 31, 2026
Retailer 12£570 GBP
Retailer 3£688 GBP
Retailer 4£725 GBP
Retailer 14£731 GBP
Retailer 7£929 GBP
Retailer 13£947 GBP
Retailer 11£1,016 GBP
Retailer 2£1,069 GBP
Retailer 6£1,176 GBP
Retailer 16£1,373 GBP
Retailer 9£1,914 GBP
Retailer 10£2,041 GBP
Retailer 8£2,174 GBP
Retailer 5£2,526 GBP
Retailer 15£2,808 GBP
Brilliant Earth£4,172 GBP

8 data points across 16 retailers

16 retailers£570 GBP to £4,172 GBP

A
Cheapest Retailer
-
£570 GBP
$764 USD
Final sale: no returns
A
Retailer 2
-
£688 GBP
HK$7,200 HKD
View
A
Retailer 3
-
£725 GBP
View
A
Retailer 4
-
£731 GBP
$980 USD
View
A
Retailer 5
-
£929 GBP
$1,245 USD
View
A
Retailer 6
-
£947 GBP
View
A
Retailer 7
-
£1,016 GBP
€1,297 EUR
View
A
Retailer 8
-
£1,069 GBP
$1,432 USD
View
A
Retailer 9
-
£1,176 GBP
ZAR 25,456 ZAR
View
B+
Retailer 10
-
£1,373 GBP
$1,840 USD
View
B+
Retailer 11
-
£1,914 GBP
$2,565 USD
View
B+
Retailer 12
-
£2,041 GBP
$2,734 USD
View
B
Retailer 13
-
£2,174 GBP
$2,914 USD
View
B
Retailer 14
-
£2,526 GBP
View
B
Retailer 15
-
£2,808 GBP
$3,762 USD
View
Most Expensive
B
Brilliant Earth
22252036A · Oct 29
£4,172 GBP
$5,590 USD
View
15 more retailers have this diamond
Prices start from £570 GBPSave up to £3,602 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
1.74ct Cushion
£570 GBP