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Radiant|Lab Grown|IGI

1.70ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG620454779

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

Certificate IGI LG620454779

Diamond specifications and retailer prices

From £135 GBP
$181 USD
As of October 27, 2026
Save £1,164 GBP (90%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,299 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

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 LG620454779 or 620454779. Listed at 9 retailers as of October 27, 2026, with prices from £135 to £1,299, a £1,164 spread on the same certified stone. Do Amore Diamonds lists it at £1,299. 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 angle43.2°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620454779
Dimensions8.48 × 5.85 × 3.98 mm
L/W Ratio1.45
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
8.48 mm5.85 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620454779
Side View
Table 66.0%Crown 43.2°Girdle: MediumPavilion 35.7°Culet: NoneDepth 68.0%

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: Oct 27
Current: £1,299 GBP|Low: £135 GBP|High: £1,351 GBP|Avg: £577 GBP|-3.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 25, 2026
Retailer 8£135 GBP
Retailer 5£157 GBP
Retailer 7£296 GBP
Retailer 12£315 GBP
Retailer 3£403 GBP
Retailer 4£502 GBP
Retailer 6£569 GBP
Retailer 11£575 GBP
Retailer 9£595 GBP
Retailer 2£866 GBP
Retailer 10£933 GBP
Do Amore Diamonds£1,299 GBP

16 data points across 12 retailers

9 retailers£135 GBP to £1,299 GBP

A
Cheapest Retailer
-
£135 GBP
$181 USD
A
Retailer 2
-
£157 GBP
$210 USD
View
B+
Retailer 3
-
£296 GBP
$397 USD
View
Retailer 4
-
£569 GBP
$763 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£595 GBP
$797 USD
View
B
Retailer 6
-
£809 GBP
View
B
Retailer 7
-
£866 GBP
View
B
Retailer 8
-
£933 GBP
$1,250 USD
View
Most Expensive
B
Do Amore Diamonds
27-E06B8DF26 · Oct 29
£1,299 GBP
$1,740 USD
View
8 more retailers have this diamond
Prices start from £135 GBPSave up to £1,164 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
£135 GBP