Cushion|Lab Grown|IGI

1.54ct D VS1 Cushion Lab Grown Diamond

GD • D/VS1 • IGI LG520292508

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG520292508

Diamond specifications and retailer prices

From £185 GBP
$248 USD
As of October 30, 2026
Save £759 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,552 GBP at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

About this 1.54ct lab-grown cushion diamond

This 1.54ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG520292508 or 520292508. Listed at 18 retailers as of October 30, 2026, with a 410% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.54
Carat
D
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520292508
Dimensions6.59 × 6.39 × 4.10 mm
L/W Ratio1.03
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
6.59 mm6.39 mm1.54 ctD / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520292508
Side View
Table 63.5%Crown 33.7°Girdle: STK-THKPavilion 33.7°Culet: NoneDepth 64.2%

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: £1,552 GBP|Low: £185 GBP|High: £1,552 GBP|Avg: £459 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
October 30, 2026
Retailer 4£185 GBP
Retailer 12£206 GBP
Retailer 6£333 GBP
Retailer 2£352 GBP
Retailer 8£353 GBP
Retailer 5£382 GBP
Retailer 3£452 GBP
Retailer 9£480 GBP
Retailer 11£532 GBP
Retailer 10£768 GBP
Retailer 7£828 GBP
Brilliant Earth£1,552 GBP

45 data points across 12 retailers

18 retailers£185 GBP to £944 GBP

A
Cheapest Retailer
-
£185 GBP
$248 USD
Final sale: no returns
A
Retailer 2
-
£206 GBP
$276 USD
View
A
Retailer 3
-
£333 GBP
€425 EUR
View
B+
Retailer 4
-
£352 GBP
$471 USD
View
A
Retailer 5
-
£353 GBP
ZAR 7,647 ZAR
View
A
Retailer 6
-
£382 GBP
View
B+
Retailer 7
-
£400 GBP
$536 USD
View
B+
Retailer 8
-
£420 GBP
$562 USD
View
B+
Retailer 9
-
£452 GBP
$605 USD
View
B+
Retailer 10
-
£480 GBP
A$990 AUD
View
B
Retailer 11
-
£532 GBP
$713 USD
View
B
Retailer 12
-
£700 GBP
$938 USD
View
B
Retailer 13
-
£768 GBP
A$1,584 AUD
View
B
Retailer 14
-
£826 GBP
$1,107 USD
View
B
Retailer 15
-
£828 GBP
View
Retailer 16
-
£886 GBP
$1,187 USD
View
Price last confirmed 82 days ago
B
Retailer 17
-
£944 GBP
$1,264 USD
View
Most Expensive
Brilliant Earth
16031645A · Oct 18
£1,552 GBP
$2,080 USD
View
Price last confirmed 12 days ago
17 more retailers have this diamond
Prices start from £185 GBPSave up to £759 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
1.54ct Cushion
£185 GBP