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Radiant|Lab Grown|IGI

1.70ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG784645655

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

Certificate IGI LG784645655

Diamond specifications and retailer prices

From £381 GBP
$507 USD
As of October 30, 2026
Save £3,674 GBP (91%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,055 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.7ct lab-grown radiant diamond

This 1.7ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG784645655 or 784645655. Listed at 14 retailers as of October 29, 2026, with prices from £381 to £4,055, a £3,674 spread on the same certified stone. Brilliant Earth lists it at £4,055. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.70
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.3°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784645655
Dimensions8.56 × 5.94 × 3.89 mm
L/W Ratio1.44
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
8.56 mm5.94 mm1.70 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784645655
Side View
Table 62.0%Crown 40.3°Girdle: MED-STKPavilion 33.5°Culet: NoneDepth 65.5%

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: £4,055 GBP|Low: £374 GBP|High: £4,183 GBP|Avg: £1,662 GBP|-3.1%
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 29, 2026
Retailer 8£381 GBP
Retailer 14£427 GBP
Retailer 6£524 GBP
Retailer 7£563 GBP
Retailer 10£577 GBP
Retailer 9£734 GBP
Retailer 5£788 GBP
Retailer 4£833 GBP
Retailer 12£1,219 GBP
Retailer 13£1,371 GBP
Retailer 2£2,275 GBP
Retailer 3£3,026 GBP
Retailer 11£3,379 GBP
Brilliant Earth£4,055 GBP

33 data points across 14 retailers

14 retailers£381 GBP to £4,055 GBP

A
Cheapest Retailer
-
£381 GBP
$507 USD
A
Retailer 2
-
£427 GBP
$568 USD
View
A
Retailer 3
-
£524 GBP
$698 USD
View
Final sale: no returns
A
Retailer 4
-
£563 GBP
$750 USD
View
A
Retailer 5
-
£577 GBP
$768 USD
View
A
Retailer 6
-
£734 GBP
$977 USD
View
A
Retailer 7
-
£788 GBP
$1,049 USD
View
A
Retailer 8
-
£833 GBP
€1,057 EUR
View
B+
Retailer 9
-
£1,219 GBP
$1,623 USD
View
B+
Retailer 10
-
£1,371 GBP
$1,826 USD
View
B
Retailer 11
-
£2,275 GBP
View
B
Retailer 12
-
£3,026 GBP
$4,030 USD
View
B
Retailer 13
-
£3,379 GBP
$4,500 USD
View
Most Expensive
B
Brilliant Earth
19064695Y · Oct 29
£4,055 GBP
$5,400 USD
View
13 more retailers have this diamond
Prices start from £381 GBPSave up to £3,674 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
1.70ct Radiant
£381 GBP