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Round|Lab Grown|IGI

1.54ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG770636780

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770636780

Diamond specifications and retailer prices

From £490 GBP
$656 USD
As of October 29, 2026
Save £2,227 GBP (82%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £3,694 GBP at Brilliant Earth · As of October 14, 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 LG770636780 or 770636780. Listed at 26 retailers as of October 29, 2026, with a 455% 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 angle32.8°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770636780
Dimensions7.46 × 7.50 × 4.48 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
7.46 mm7.50 mm1.54 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770636780
Side View
Table 59.0%Crown 32.8°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.0%

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 29
Current: £2,717 GBP|Low: £490 GBP|High: £3,694 GBP|Avg: £1,216 GBP|-26.5%
Brilliant Earth
Retailer 2
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Retailer 23
November 1, 2026
Retailer 22£490 GBP
Retailer 21£532 GBP
Retailer 12£548 GBP
Retailer 6£568 GBP
Retailer 18£580 GBP
Retailer 4£659 GBP
Retailer 10£750 GBP
Retailer 2£777 GBP
Retailer 11£813 GBP
Retailer 19£813 GBP
Retailer 8£828 GBP
Retailer 17£904 GBP
Retailer 13£904 GBP
Retailer 7£921 GBP
Retailer 3£1,034 GBP
Retailer 5£1,241 GBP
Retailer 20£1,630 GBP
Retailer 16£1,914 GBP
Retailer 14£1,936 GBP
Retailer 9£1,958 GBP
Retailer 15£1,976 GBP
Retailer 23£2,404 GBP
Brilliant Earth£2,717 GBP

21 data points across 23 retailers

26 retailers£490 GBP to £2,717 GBP

A
Cheapest Retailer
-
£490 GBP
$656 USD
A
Retailer 2
-
£532 GBP
$713 USD
View
A
Retailer 3
-
£548 GBP
$734 USD
View
Final sale: no returns
Retailer 4
-
£568 GBP
$761 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£580 GBP
$777 USD
View
A
Retailer 6
-
£659 GBP
HK$6,900 HKD
View
A
Retailer 7
-
£750 GBP
$1,005 USD
View
A
Retailer 8
-
£777 GBP
View
B+
Retailer 9
-
£813 GBP
$1,090 USD
View
B+
Retailer 10
-
£813 GBP
$1,090 USD
View
B+
Retailer 11
-
£828 GBP
$1,109 USD
View
B+
Retailer 12
-
£904 GBP
€1,154 EUR
View
B+
Retailer 13
-
£904 GBP
View
B+
Retailer 14
-
£921 GBP
A$1,898 AUD
View
Retailer 15
-
£1,034 GBP
ZAR 22,372 ZAR
View
Price last confirmed 8 days ago
B+
Retailer 16
-
£1,241 GBP
$1,663 USD
View
B
Retailer 17
-
£1,320 GBP
$1,768 USD
View
B+
Retailer 18
-
£1,630 GBP
$2,184 USD
View
B
Retailer 19
-
£1,832 GBP
$2,455 USD
View
B
Retailer 20
-
£1,914 GBP
SGD 3,466 SGD
View
B
Retailer 21
-
£1,936 GBP
$2,594 USD
View
B
Retailer 22
-
£1,958 GBP
$2,624 USD
View
B
Retailer 23
-
£1,976 GBP
$2,647 USD
View
B
Retailer 24
-
£2,404 GBP
View
B
Retailer 25
-
£2,717 GBP
$3,640 USD
View
Most Expensive
Brilliant Earth
18937699A · Oct 14
£3,694 GBP
$4,950 USD
View
Price last confirmed 17 days ago
25 more retailers have this diamond
Prices start from £490 GBPSave up to £2,227 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
£490 GBP