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Radiant|Lab Grown|IGI

1.70ct I VS1 Radiant Lab Grown Diamond

EX • I/VS1 • IGI LG551292836

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

Certificate IGI LG551292836

Diamond specifications and retailer prices

From £1,423 GBP
$1,906 USD
As of November 1, 2026
Save £1,739 GBP (55%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £4,385 GBP at The Diamond Guys · As of November 2, 2026
View at The Diamond Guys

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 I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG551292836 or 551292836. Listed at 3 retailers as of November 1, 2026, with a 122% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.70
Carat
I
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.2°
Pavilion angle30.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG551292836
Dimensions8.29 × 5.75 × 3.91 mm
L/W Ratio1.44
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
8.29 mm5.75 mm1.70 ctI / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG551292836
Side View
Table 64.0%Crown 45.2°Girdle: Slightly ThickPavilion 30.4°Culet: NoneDepth 68.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 1
Current: £3,161 GBP|Low: £1,041 GBP|High: £4,385 GBP|Avg: £2,154 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
The Diamond Guys
November 2, 2026
Retailer 4£1,041 GBP
Retailer 3£1,105 GBP
Retailer 2£1,423 GBP
Retailer 1£3,161 GBP
The Diamond Guys£4,385 GBP

3 data points across 5 retailers

3 retailers£1,423 GBP to £3,161 GBP

B
Cheapest Retailer
-
£1,423 GBP
$1,906 USD
B
Retailer 2
-
£3,161 GBP
View
Most Expensive
The Diamond Guys
1998851176 · Nov 2
£4,385 GBP
$5,875 USD
View
Price under review
2 more retailers have this diamond
Prices start from £1,423 GBPSave up to £1,739 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
1.70ct Radiant
£1,423 GBP