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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 €491 EUR
$548 USD
As of November 1, 2026
Save €1,312 EUR (73%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €1,803 EUR 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 €491 to €1,803, a €1,312 spread on the same certified stone. MOH London lists it at €1,803. 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

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: €1,803 EUR|Low: €491 EUR|High: €1,815 EUR|Avg: €1,054 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 4€491 EUR
Retailer 3€702 EUR
Retailer 2€1,240 EUR
MOH London€1,803 EUR

12 data points across 4 retailers

4 retailers€491 EUR to €1,803 EUR

A
Cheapest Retailer
-
€491 EUR
$548 USD
B+
Retailer 2
-
€702 EUR
$784 USD
View
B
Retailer 3
-
€1,240 EUR
$1,385 USD
View
Most Expensive
B
MOH London
LG480151040 · Oct 29
€1,803 EUR
£1,586 GBP
View
3 more retailers have this diamond
Prices start from €491 EURSave up to €1,312 EUR

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
€491 EUR