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Radiant|Lab Grown|IGI

2.51ct F SI1 Radiant Lab Grown Diamond

GD • F/SI1 • IGI LG667450173

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

Certificate IGI LG667450173

Diamond specifications and retailer prices

From €652 EUR
$731 USD
As of November 2, 2026
Save €213 EUR (25%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €865 EUR at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

About this 2.51ct lab-grown radiant diamond

This 2.51ct lab-grown radiant sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG667450173 or 667450173. Listed at 2 retailers as of November 2, 2026, with prices from €652 to €865, a €213 spread on the same certified stone. Diamond Quarter lists it at €865. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

2.51
Carat
F
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG667450173
Dimensions9.84 × 6.56 × 4.47 mm
L/W Ratio1.50
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.84 mm6.56 mm2.51 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG667450173
Side View
Table 67.0%Crown 41.3°Girdle: MediumPavilion 35.3°Culet: NoneDepth 68.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €652 EUR|Low: €630 EUR|High: €1,024 EUR|Avg: €773 EUR|-36.4%
September 23, 2026
Retailer 1€652 EUR

4 data points across 1 retailer

2 retailers€652 EUR to €865 EUR

B+
Cheapest Retailer
-
€652 EUR
$731 USD
Most Expensive
B+
Diamond Quarter
2.51SI1FLG7352C8N · Nov 2
€865 EUR
£764 GBP
View
1 more retailer has this diamond
Prices start from €652 EURSave up to €213 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.

B+
2.51ct Radiant
€652 EUR