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Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG771654551

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

Certificate IGI LG771654551

Diamond specifications and retailer prices

From £238 GBP
$319 USD
As of October 30, 2026
Save £1,956 GBP (89%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: £3,388 GBP at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.57ct lab-grown radiant diamond

This 1.57ct 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 LG771654551 or 771654551. Listed at 29 retailers as of October 30, 2026, with a 822% 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

1.57
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771654551
Dimensions8.56 × 5.75 × 3.74 mm
L/W Ratio1.49
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
8.56 mm5.75 mm1.57 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771654551
Side View
Table 61.0%Crown 38.4°Girdle: MED-STKPavilion 34.9°Culet: NoneDepth 65.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £2,194 GBP|Low: £235 GBP|High: £3,388 GBP|Avg: £826 GBP|-35.2%
Brilliant Earth
Retailer 2
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Retailer 26
October 31, 2026
Retailer 17£235 GBP
Retailer 9£238 GBP
Retailer 7£264 GBP
Retailer 11£264 GBP
Retailer 16£273 GBP
Retailer 20£310 GBP
Retailer 8£373 GBP
Retailer 25£381 GBP
Retailer 13£386 GBP
Retailer 26£460 GBP
Retailer 24£502 GBP
Retailer 21£520 GBP
Retailer 2£561 GBP
Retailer 6£631 GBP
Retailer 22£680 GBP
Retailer 4£812 GBP
Retailer 10£938 GBP
Retailer 19£972 GBP
Retailer 5£1,017 GBP
Retailer 15£1,085 GBP
Retailer 14£1,092 GBP
Retailer 18£1,137 GBP
Retailer 12£1,172 GBP
Retailer 23£1,840 GBP
Retailer 3£1,896 GBP
Brilliant Earth£2,194 GBP

26 data points across 26 retailers

29 retailers£238 GBP to £2,194 GBP

Retailer 1
-
£235 GBP
$315 USD
Price last confirmed 10 days ago
A
Retailer 2
-
£238 GBP
$319 USD
View
Final sale: no returns
A
Retailer 3
-
£264 GBP
$354 USD
View
A
Retailer 4
-
£264 GBP
$354 USD
View
Retailer 5
-
£273 GBP
$366 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
£310 GBP
View
A
Retailer 7
-
£373 GBP
HK$3,900 HKD
View
A
Retailer 8
-
£381 GBP
$510 USD
View
A
Retailer 9
-
£386 GBP
$517 USD
View
A
Retailer 10
-
£460 GBP
$617 USD
View
A
Retailer 11
-
£502 GBP
ZAR 10,856 ZAR
View
A
Retailer 12
-
£520 GBP
View
A
Retailer 13
-
£561 GBP
€716 EUR
View
A
Retailer 14
-
£631 GBP
$845 USD
View
A
Retailer 15
-
£680 GBP
A$1,402 AUD
View
A
Retailer 16
-
£812 GBP
$1,088 USD
View
B+
Retailer 17
-
£938 GBP
$1,257 USD
View
B+
Retailer 18
-
£972 GBP
$1,303 USD
View
B+
Retailer 19
-
£994 GBP
$1,332 USD
View
B+
Retailer 20
-
£1,017 GBP
$1,363 USD
View
B+
Retailer 21
-
£1,085 GBP
SGD 1,965 SGD
View
B+
Retailer 22
-
£1,092 GBP
$1,464 USD
View
Retailer 23
-
£1,137 GBP
View
Price last confirmed 10 days ago
B+
Retailer 24
-
£1,172 GBP
View
B+
Retailer 25
-
£1,840 GBP
$2,465 USD
View
B
Retailer 26
-
£1,896 GBP
$2,540 USD
View
B
Retailer 27
-
£2,123 GBP
View
B
Retailer 28
-
£2,194 GBP
$2,940 USD
View
Most Expensive
Brilliant Earth
17479782A · Oct 24
£3,388 GBP
$4,540 USD
View
Price last confirmed 7 days ago
28 more retailers have this diamond
Prices start from £238 GBPSave up to £1,956 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
1.57ct Radiant
£238 GBP