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Radiant|Lab Grown|IGI

2.57ct F IF Radiant Lab Grown Diamond

ID • F/IF • IGI LG690511152

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

Certificate IGI LG690511152

Diamond specifications and retailer prices

From £1,311 GBP
$1,759 USD
As of October 31, 2026
Save £3,274 GBP (71%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,585 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG690511152 or 690511152. Listed at 7 retailers as of October 31, 2026, with prices from £1,311 to £4,585, a £3,274 spread on the same certified stone. Taylor and Hart lists it at £4,585. 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
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG690511152
Dimensions9.78 × 6.62 × 4.62 mm
L/W Ratio1.48
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.78 mm6.62 mm2.57 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG690511152
Side View
Table 65.0%Crown 42.1°Girdle: MediumPavilion 35.1°Culet: NoneDepth 69.8%

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 31
Current: £1,820 GBP|Low: £1,240 GBP|High: £4,585 GBP|Avg: £2,531 GBP|+8.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
October 28, 2026
Retailer 6£1,311 GBP
Retailer 5£1,383 GBP
Retailer 1£1,820 GBP
Retailer 4£1,856 GBP
Retailer 2£3,107 GBP
Retailer 3£3,723 GBP
Taylor and Hart£4,585 GBP

25 data points across 7 retailers

7 retailers£1,311 GBP to £4,585 GBP

A
Cheapest Retailer
-
£1,311 GBP
$1,759 USD
A
Retailer 2
-
£1,383 GBP
$1,856 USD
View
A
Retailer 3
-
£1,820 GBP
View
A
Retailer 4
-
£1,856 GBP
$2,491 USD
View
Retailer 5
-
£3,107 GBP
$4,170 USD
View
Price last confirmed 12 days ago
Retailer 6
-
£3,723 GBP
View
Price last confirmed 12 days ago
Most Expensive
B
Taylor and Hart
MN2IATT · Oct 31
£4,585 GBP
$6,152 USD
View
6 more retailers have this diamond
Prices start from £1,311 GBPSave up to £3,274 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
£1,311 GBP