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Radiant|Lab Grown|IGI

2.57ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG700540698

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

Certificate IGI LG700540698

Diamond specifications and retailer prices

From £661 GBP
$885 USD
As of October 31, 2026
Save £3,489 GBP (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,150 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG700540698 or 700540698. Listed at 12 retailers as of October 31, 2026, with prices from £661 to £4,150, a £3,489 spread on the same certified stone. Brilliant Earth lists it at £4,150. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.57
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG700540698
Dimensions9.74 × 6.50 × 4.65 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
9.74 mm6.50 mm2.57 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG700540698
Side View
Table 63.0%Crown 40.9°Girdle: MED-STKPavilion 36°Culet: NoneDepth 71.5%

Caratlytics Score

How it works →
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 31
Current: £4,150 GBP|Low: £573 GBP|High: £4,373 GBP|Avg: £2,028 GBP|-3.0%
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
October 31, 2026
Retailer 4£573 GBP
Retailer 14£661 GBP
Retailer 3£690 GBP
Retailer 9£874 GBP
Retailer 2£953 GBP
Retailer 11£1,414 GBP
Retailer 5£1,534 GBP
Retailer 12£1,584 GBP
Retailer 8£2,492 GBP
Retailer 7£2,641 GBP
Retailer 13£3,116 GBP
Retailer 6£3,319 GBP
Retailer 10£4,082 GBP
Brilliant Earth£4,150 GBP

18 data points across 14 retailers

12 retailers£661 GBP to £4,150 GBP

A
Cheapest Retailer
-
£661 GBP
$885 USD
A
Retailer 2
-
£690 GBP
$924 USD
View
A
Retailer 3
-
£874 GBP
$1,171 USD
View
A
Retailer 4
-
£953 GBP
€1,216 EUR
View
A
Retailer 5
-
£1,414 GBP
$1,895 USD
View
A
Retailer 6
-
£1,534 GBP
$2,055 USD
View
A
Retailer 7
-
£1,584 GBP
$2,122 USD
View
B+
Retailer 8
-
£2,492 GBP
View
B+
Retailer 9
-
£2,641 GBP
A$5,445 AUD
View
B+
Retailer 10
-
£3,116 GBP
$4,175 USD
View
B
Retailer 11
-
£4,082 GBP
$5,470 USD
View
Most Expensive
B
Brilliant Earth
13959243Y · Oct 31
£4,150 GBP
$5,560 USD
View
11 more retailers have this diamond
Prices start from £661 GBPSave up to £3,489 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
2.57ct Radiant
£661 GBP