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Radiant|Lab Grown|IGI

1.70ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG480151040

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

Certificate IGI LG480151040

Diamond specifications and retailer prices

From £409 GBP
$548 USD
As of October 30, 2026
Save £1,094 GBP (73%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,503 GBP at MOH London · As of October 29, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG480151040 or 480151040. Listed at 4 retailers as of October 29, 2026, with prices from £409 to £1,503, a £1,094 spread on the same certified stone. MOH London lists it at £1,503. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.8°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG480151040
Dimensions8.16 × 5.89 × 4.12 mm
L/W Ratio1.39
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
8.16 mm5.89 mm1.70 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG480151040
Side View
Table 64.0%Crown 44.8°Girdle: Slightly ThickPavilion 37.4°Culet: NoneDepth 69.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £1,503 GBP|Low: £409 GBP|High: £1,514 GBP|Avg: £879 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 4£409 GBP
Retailer 3£585 GBP
Retailer 2£1,034 GBP
MOH London£1,503 GBP

12 data points across 4 retailers

4 retailers£409 GBP to £1,503 GBP

A
Cheapest Retailer
-
£409 GBP
$548 USD
B+
Retailer 2
-
£585 GBP
$784 USD
View
B
Retailer 3
-
£1,034 GBP
$1,385 USD
View
Most Expensive
B
MOH London
LG480151040 · Oct 29
£1,503 GBP
View
3 more retailers have this diamond
Prices start from £409 GBPSave up to £1,094 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
£409 GBP