Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG593386843

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

Certificate IGI LG593386843

Diamond specifications and retailer prices

From £257 GBP
$344 USD
As of October 30, 2026
Save £2,340 GBP (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £2,597 GBP at Brilliant Earth · As of October 8, 2026
View at Brilliant Earth

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG593386843 or 593386843. Listed at 23 retailers as of October 30, 2026, with a 912% 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

1.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.4°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG593386843
Dimensions7.83 × 5.74 × 3.92 mm
L/W Ratio1.36
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
7.83 mm5.74 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG593386843
Side View
Table 62.0%Crown 42.4°Girdle: MediumPavilion 36°Culet: NoneDepth 68.3%

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: £2,597 GBP|Low: £246 GBP|High: £2,597 GBP|Avg: £779 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 3£257 GBP
Retailer 7£287 GBP
Retailer 4£318 GBP
Retailer 9£328 GBP
Retailer 12£427 GBP
Retailer 15£433 GBP
Retailer 14£547 GBP
Retailer 11£560 GBP
Retailer 10£572 GBP
Retailer 13£739 GBP
Retailer 16£767 GBP
Retailer 6£1,023 GBP
Retailer 5£1,202 GBP
Retailer 8£1,234 GBP
Retailer 2£1,244 GBP
Brilliant Earth£2,597 GBP

32 data points across 16 retailers

23 retailers£257 GBP to £2,597 GBP

A
Cheapest Retailer
-
£257 GBP
$344 USD
A
Retailer 2
-
£287 GBP
$385 USD
View
Final sale: no returns
A
Retailer 3
-
£298 GBP
$399 USD
View
A
Retailer 4
-
£318 GBP
$426 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£318 GBP
$426 USD
View
A
Retailer 6
-
£328 GBP
View
A
Retailer 7
-
£427 GBP
$572 USD
View
A
Retailer 8
-
£433 GBP
$580 USD
View
A
Retailer 9
-
£509 GBP
$682 USD
View
A
Retailer 10
-
£547 GBP
ZAR 11,839 ZAR
View
A
Retailer 11
-
£560 GBP
€715 EUR
View
A
Retailer 12
-
£572 GBP
View
A
Retailer 13
-
£739 GBP
A$1,523 AUD
View
B+
Retailer 14
-
£767 GBP
$1,028 USD
View
B+
Retailer 15
-
£769 GBP
$1,031 USD
View
B+
Retailer 16
-
£1,023 GBP
$1,371 USD
View
B+
Retailer 17
-
£1,031 GBP
View
B+
Retailer 18
-
£1,055 GBP
$1,413 USD
View
B+
Retailer 19
-
£1,202 GBP
$1,611 USD
View
B+
Retailer 20
-
£1,234 GBP
$1,653 USD
View
B+
Retailer 21
-
£1,244 GBP
View
B
Retailer 22
-
£2,597 GBP
$3,480 USD
View
Most Expensive
Brilliant Earth
21385297A · Oct 8
£2,597 GBP
$3,480 USD
View
Price last confirmed 23 days ago
22 more retailers have this diamond
Prices start from £257 GBPSave up to £2,340 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
1.51ct Radiant
£257 GBP