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Radiant|Lab Grown|IGI

1.70ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG617427460

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

Certificate IGI LG617427460

Diamond specifications and retailer prices

From £134 GBP
$180 USD
As of November 2, 2026
Save £791 GBP (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £925 GBP at Brilliant Earth · As of October 31, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG617427460 or 617427460. Listed at 14 retailers as of October 31, 2026, with prices from £134 to £925, a £791 spread on the same certified stone. Brilliant Earth lists it at £925. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.70
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.1°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617427460
Dimensions8.33 × 5.89 × 4.02 mm
L/W Ratio1.41
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.33 mm5.89 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617427460
Side View
Table 65.0%Crown 43.1°Girdle: MediumPavilion 35.9°Culet: NoneDepth 68.3%

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: Nov 2
Current: £925 GBP|Low: £134 GBP|High: £1,060 GBP|Avg: £406 GBP|-12.7%
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
November 2, 2026
Retailer 12£134 GBP
Retailer 9£156 GBP
Retailer 4£166 GBP
Retailer 5£166 GBP
Retailer 11£214 GBP
Retailer 3£295 GBP
Retailer 7£299 GBP
Retailer 2£300 GBP
Retailer 10£415 GBP
Retailer 14£422 GBP
Retailer 13£535 GBP
Retailer 6£565 GBP
Retailer 8£783 GBP
Brilliant Earth£925 GBP

38 data points across 14 retailers

14 retailers£134 GBP to £925 GBP

A
Cheapest Retailer
-
£134 GBP
$180 USD
A
Retailer 2
-
£156 GBP
$209 USD
View
A
Retailer 3
-
£166 GBP
$223 USD
View
Retailer 4
-
£166 GBP
$223 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£295 GBP
$395 USD
View
A
Retailer 6
-
£299 GBP
€381 EUR
View
A
Retailer 7
-
£300 GBP
View
A
Retailer 8
-
£415 GBP
$556 USD
View
A
Retailer 9
-
£422 GBP
$565 USD
View
B+
Retailer 10
-
£535 GBP
$717 USD
View
B+
Retailer 11
-
£565 GBP
$757 USD
View
B+
Retailer 12
-
£571 GBP
View
B+
Retailer 13
-
£783 GBP
View
Most Expensive
B
Brilliant Earth
9016409A · Oct 31
£925 GBP
$1,240 USD
View
13 more retailers have this diamond
Prices start from £134 GBPSave up to £791 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
£134 GBP