Radiant|Lab Grown|IGI

1.50ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG780636147

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG780636147

Diamond specifications and retailer prices

From £229 GBP
$307 USD
As of November 1, 2026
Save £1,891 GBP (89%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £2,120 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.5ct lab-grown radiant diamond

This 1.5ct lab-grown radiant 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 LG780636147 or 780636147. Listed at 27 retailers as of October 27, 2026, with prices from £229 to £2,120, a £1,891 spread on the same certified stone. Queensmith lists it at £2,120. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780636147
Dimensions8.50 × 5.65 × 3.77 mm
L/W Ratio1.50
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
8.50 mm5.65 mm1.50 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780636147
Side View
Table 62.0%Crown 38.1°Girdle: Slightly ThickPavilion 33.4°Culet: NoneDepth 66.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £492 GBP|Low: £226 GBP|High: £2,094 GBP|Avg: £743 GBP|-9.2%
Retailer 1
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Retailer 24
November 2, 2026
Retailer 13£226 GBP
Retailer 7£229 GBP
Retailer 10£262 GBP
Retailer 16£279 GBP
Retailer 6£362 GBP
Retailer 18£370 GBP
Retailer 23£373 GBP
Retailer 24£448 GBP
Retailer 11£471 GBP
Retailer 12£482 GBP
Retailer 1£492 GBP
Retailer 5£578 GBP
Retailer 22£651 GBP
Retailer 3£778 GBP
Retailer 14£899 GBP
Retailer 17£934 GBP
Retailer 4£974 GBP
Retailer 9£1,049 GBP
Retailer 8£1,063 GBP
Retailer 15£1,090 GBP
Retailer 20£1,126 GBP
Retailer 2£1,811 GBP
Retailer 21£1,829 GBP
Retailer 19£2,094 GBP

33 data points across 24 retailers

27 retailers£229 GBP to £2,120 GBP

Retailer 1
-
£226 GBP
$303 USD
Price last confirmed 12 days ago
A
Retailer 2
-
£229 GBP
$307 USD
View
Final sale: no returns
Retailer 3
-
£262 GBP
$351 USD
View
Price last confirmed 13 days ago
Retailer 4
-
£279 GBP
$375 USD
View
Price last confirmed 17 days ago
Retailer 5
-
£279 GBP
$375 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
£362 GBP
HK$3,800 HKD
View
A
Retailer 7
-
£370 GBP
$497 USD
View
A
Retailer 8
-
£373 GBP
$500 USD
View
A
Retailer 9
-
£448 GBP
$601 USD
View
Retailer 10
-
£471 GBP
€602 EUR
View
Price last confirmed 10 days ago
A
Retailer 11
-
£482 GBP
ZAR 10,452 ZAR
View
A
Retailer 12
-
£492 GBP
View
A
Retailer 13
-
£578 GBP
$775 USD
View
A
Retailer 14
-
£651 GBP
A$1,345 AUD
View
B+
Retailer 15
-
£778 GBP
$1,044 USD
View
Retailer 16
-
£899 GBP
$1,206 USD
View
Price last confirmed 11 days ago
B+
Retailer 17
-
£934 GBP
$1,253 USD
View
B+
Retailer 18
-
£948 GBP
$1,272 USD
View
B+
Retailer 19
-
£974 GBP
$1,307 USD
View
B+
Retailer 20
-
£1,049 GBP
SGD 1,902 SGD
View
B+
Retailer 21
-
£1,063 GBP
$1,427 USD
View
Retailer 22
-
£1,090 GBP
View
Price last confirmed 12 days ago
B+
Retailer 23
-
£1,126 GBP
View
B
Retailer 24
-
£1,811 GBP
$2,430 USD
View
B
Retailer 25
-
£1,829 GBP
$2,455 USD
View
B
Retailer 26
-
£2,094 GBP
$2,810 USD
View
Most Expensive
B
Queensmith
LG780636147 · Oct 27
£2,120 GBP
View
26 more retailers have this diamond
Prices start from £229 GBPSave up to £1,891 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
1.50ct Radiant
£229 GBP