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Radiant|Lab Grown|IGI

3.17ct F IF Radiant Lab Grown Diamond

ID • F/IF • IGI LG579395078

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

Certificate IGI LG579395078

Diamond specifications and retailer prices

From £2,648 GBP
$3,553 USD
As of November 2, 2026
Save £6,817 GBP (72%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £9,464 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 3.17ct lab-grown radiant diamond

This 3.17ct lab-grown radiant sits in the three to five carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG579395078 or 579395078. Listed at 10 retailers as of October 31, 2026, with prices from £2,648 to £9,464, a £6,817 spread on the same certified stone. Taylor and Hart lists it at £9,464. 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

3.17
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle49.5°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG579395078
Dimensions8.07 × 8.04 × 5.31 mm
L/W Ratio1.00
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
8.07 mm8.04 mm3.17 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG579395078
Side View
Table 62.0%Crown 49.5°Girdle: MED-STKPavilion 31.6°Culet: NoneDepth 66.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £2,984 GBP|Low: £2,648 GBP|High: £10,078 GBP|Avg: £5,071 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Taylor and Hart
November 2, 2026
Retailer 10£2,648 GBP
Retailer 9£2,712 GBP
Retailer 8£2,828 GBP
Retailer 1£2,984 GBP
Retailer 3£3,669 GBP
Retailer 6£3,882 GBP
Retailer 11£4,690 GBP
Retailer 5£6,295 GBP
Retailer 7£6,762 GBP
Retailer 4£6,873 GBP
Retailer 2£7,698 GBP
Taylor and Hart£9,464 GBP

37 data points across 12 retailers

10 retailers£2,648 GBP to £9,464 GBP

B+
Cheapest Retailer
-
£2,648 GBP
$3,553 USD
Retailer 2
-
£2,712 GBP
$3,639 USD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
£2,828 GBP
$3,795 USD
View
B+
Retailer 4
-
£2,984 GBP
View
B+
Retailer 5
-
£3,882 GBP
$5,210 USD
View
B
Retailer 6
-
£4,690 GBP
View
B
Retailer 7
-
£6,295 GBP
ZAR 136,465 ZAR
View
B
Retailer 8
-
£6,762 GBP
$9,074 USD
View
B
Retailer 9
-
£6,873 GBP
View
Most Expensive
B
Taylor and Hart
IEJVIMC · Oct 31
£9,464 GBP
$12,701 USD
View
9 more retailers have this diamond
Prices start from £2,648 GBPSave up to £6,817 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.

B+
3.17ct Radiant
£2,648 GBP