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Radiant|Lab Grown|IGI

3.17ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG843670833

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

Certificate IGI LG843670833

Diamond specifications and retailer prices

From £1,854 GBP
$2,484 USD
As of October 31, 2026
Save £4,572 GBP (71%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £6,426 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.17ct lab-grown radiant diamond

This 3.17ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG843670833 or 843670833. Listed at 4 retailers as of October 30, 2026, with prices from £1,854 to £6,426, a £4,572 spread on the same certified stone. Brilliant Earth lists it at £6,426. 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
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.5°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843670833
Dimensions8.36 × 8.17 × 5.44 mm
L/W Ratio1.02
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
8.36 mm8.17 mm3.17 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843670833
Side View
Table 67.0%Crown 44.5°Girdle: MED-STKPavilion 38.4°Culet: NoneDepth 66.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £6,426 GBP|Low: £1,854 GBP|High: £9,046 GBP|Avg: £4,109 GBP|-29.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 2£1,854 GBP
Retailer 3£2,148 GBP
Retailer 4£4,101 GBP
Brilliant Earth£6,426 GBP

6 data points across 4 retailers

4 retailers£1,854 GBP to £6,426 GBP

A
Cheapest Retailer
-
£1,854 GBP
$2,484 USD
Retailer 2
-
£2,148 GBP
€2,741 EUR
View
Price last confirmed 7 days ago
Retailer 3
-
£4,101 GBP
$5,495 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
22165278Y · Oct 30
£6,426 GBP
$8,610 USD
View
3 more retailers have this diamond
Prices start from £1,854 GBPSave up to £4,572 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
3.17ct Radiant
£1,854 GBP