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Round|Lab Grown|IGI

1.54ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG781617081

Shape and cutting style on the report: Round brilliant

Certificate IGI LG781617081

Diamond specifications and retailer prices

From £326 GBP
$437 USD
As of October 29, 2026
Save £1,547 GBP (83%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £2,426 GBP at Brilliant Earth · As of October 16, 2026
View at Brilliant Earth

About this 1.54ct lab-grown round diamond

This 1.54ct lab-grown round 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 LG781617081 or 781617081. Listed at 26 retailers as of October 29, 2026, with a 474% 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

1.54
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781617081
Dimensions7.29 × 7.36 × 4.58 mm
L/W Ratio1.01
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
7.29 mm7.36 mm1.54 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781617081
Side View
Table 56.0%Crown 35.8°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A+
Exceptional
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 29
Current: £1,873 GBP|Low: £326 GBP|High: £2,433 GBP|Avg: £866 GBP|-23.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
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Retailer 17
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Retailer 19
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Retailer 21
Retailer 22
November 1, 2026
Retailer 3£326 GBP
Retailer 22£366 GBP
Retailer 17£378 GBP
Retailer 7£405 GBP
Retailer 8£405 GBP
Retailer 21£439 GBP
Retailer 20£511 GBP
Retailer 9£543 GBP
Retailer 13£632 GBP
Retailer 6£640 GBP
Retailer 2£666 GBP
Retailer 19£695 GBP
Retailer 15£712 GBP
Retailer 5£773 GBP
Retailer 16£919 GBP
Retailer 11£1,285 GBP
Retailer 4£1,301 GBP
Retailer 14£1,326 GBP
Retailer 10£1,456 GBP
Retailer 18£1,494 GBP
Retailer 12£1,514 GBP
Brilliant Earth£1,873 GBP

36 data points across 22 retailers

26 retailers£326 GBP to £1,873 GBP

A+
Cheapest Retailer
-
£326 GBP
$437 USD
A
Retailer 2
-
£366 GBP
$490 USD
View
A
Retailer 3
-
£378 GBP
$507 USD
View
Final sale: no returns
A
Retailer 4
-
£405 GBP
$542 USD
View
A
Retailer 5
-
£405 GBP
$542 USD
View
A
Retailer 6
-
£439 GBP
HK$4,600 HKD
View
A
Retailer 7
-
£511 GBP
$685 USD
View
A
Retailer 8
-
£543 GBP
$728 USD
View
A
Retailer 9
-
£632 GBP
€806 EUR
View
A
Retailer 10
-
£640 GBP
$857 USD
View
A
Retailer 11
-
£666 GBP
View
A
Retailer 12
-
£695 GBP
ZAR 15,048 ZAR
View
A
Retailer 13
-
£712 GBP
A$1,468 AUD
View
A
Retailer 14
-
£773 GBP
$1,036 USD
View
B+
Retailer 15
-
£919 GBP
$1,232 USD
View
Retailer 16
-
£1,141 GBP
$1,529 USD
View
Price last confirmed 46 days ago
B+
Retailer 17
-
£1,285 GBP
SGD 2,326 SGD
View
B
Retailer 18
-
£1,301 GBP
$1,743 USD
View
B+
Retailer 19
-
£1,326 GBP
$1,776 USD
View
B+
Retailer 20
-
£1,351 GBP
$1,810 USD
View
B+
Retailer 21
-
£1,416 GBP
$1,897 USD
View
B+
Retailer 22
-
£1,456 GBP
$1,950 USD
View
B+
Retailer 23
-
£1,494 GBP
View
B+
Retailer 24
-
£1,514 GBP
$2,029 USD
View
B
Retailer 25
-
£1,873 GBP
$2,510 USD
View
Most Expensive
Brilliant Earth
18904911A · Oct 16
£2,426 GBP
$3,250 USD
View
Price last confirmed 15 days ago
25 more retailers have this diamond
Prices start from £326 GBPSave up to £1,547 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 Round
£326 GBP