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Radiant|Lab Grown|IGI

1.71ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG512231580

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

Certificate IGI LG512231580

Diamond specifications and retailer prices

From €976 EUR
$1,090 USD
As of October 31, 2026
Save €3,859 EUR (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €4,835 EUR at MOH London · As of October 27, 2026
View at MOH London

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512231580 or 512231580. Listed at 11 retailers as of October 27, 2026, with prices from €976 to €4,835, a €3,859 spread on the same certified stone. MOH London lists it at €4,835. 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

1.71
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.1°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512231580
Dimensions7.68 × 5.82 × 4.03 mm
L/W Ratio1.32
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
7.68 mm5.82 mm1.71 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512231580
Side View
Table 68.0%Crown 47.1°Girdle: ThickPavilion 30.1°Culet: NoneDepth 69.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: €4,835 EUR|Low: €976 EUR|High: €4,886 EUR|Avg: €2,514 EUR|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 2€976 EUR
Retailer 7€1,457 EUR
Retailer 11€1,585 EUR
Retailer 12€1,632 EUR
Retailer 8€1,691 EUR
Retailer 13€1,844 EUR
Retailer 5€1,859 EUR
Retailer 3€2,273 EUR
Retailer 9€2,657 EUR
Retailer 6€2,914 EUR
Retailer 10€3,169 EUR
MOH London€4,835 EUR
Retailer 4€4,840 EUR

17 data points across 13 retailers

11 retailers€976 EUR to €4,835 EUR

A
Cheapest Retailer
-
€976 EUR
$1,090 USD
B+
Retailer 2
-
€1,457 EUR
$1,628 USD
View
B+
Retailer 3
-
€1,585 EUR
$1,771 USD
View
B+
Retailer 4
-
€1,632 EUR
$1,823 USD
View
Final sale: no returns
Retailer 5
-
€1,691 EUR
$1,889 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
€1,691 EUR
$1,889 USD
View
B+
Retailer 7
-
€1,844 EUR
$2,060 USD
View
B
Retailer 8
-
€2,657 EUR
$2,968 USD
View
B
Retailer 9
-
€2,914 EUR
$3,256 USD
View
B
Retailer 10
-
€3,169 EUR
$3,540 USD
View
Most Expensive
B
MOH London
LG512231580 · Oct 27
€4,835 EUR
£4,253 GBP
View
10 more retailers have this diamond
Prices start from €976 EURSave up to €3,859 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
1.71ct Radiant
€976 EUR