Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG816657809

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

Certificate IGI LG816657809

Diamond specifications and retailer prices

From €525 EUR
As of October 31, 2026
Save €765 EUR (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €2,036 EUR at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816657809 or 816657809. Listed at 9 retailers as of October 31, 2026, with a 146% 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

1.51
Carat
E
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle27.2°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816657809
Dimensions8.03 × 5.73 × 3.81 mm
L/W Ratio1.40
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
8.03 mm5.73 mm1.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816657809
Side View
Table 66.0%Crown 27.2°Girdle: Slightly ThickPavilion 35.6°Culet: NoneDepth 66.5%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: €2,036 EUR|Low: €434 EUR|High: €2,063 EUR|Avg: €913 EUR|+4.8%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 4€525 EUR
Retailer 5€529 EUR
Retailer 6€555 EUR
Retailer 3€570 EUR
Retailer 8€906 EUR
Retailer 7€989 EUR
Retailer 2€1,290 EUR
Rare Carat€2,036 EUR

43 data points across 8 retailers

9 retailers€525 EUR to €1,290 EUR

A
Cheapest Retailer
-
€525 EUR
A
Retailer 2
-
€529 EUR
$591 USD
View
A
Retailer 3
-
€555 EUR
$620 USD
View
A
Retailer 4
-
€570 EUR
£501 GBP
View
B+
Retailer 5
-
€906 EUR
$1,012 USD
View
B+
Retailer 6
-
€1,010 EUR
$1,128 USD
View
B+
Retailer 7
-
€1,079 EUR
$1,205 USD
View
B+
Retailer 8
-
€1,290 EUR
£1,135 GBP
View
Most Expensive
Rare Carat
NV54-113A · Oct 18
€2,036 EUR
$2,275 USD
View
Price last confirmed 13 days ago
8 more retailers have this diamond
Prices start from €525 EURSave up to €765 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
1.51ct Radiant
€525 EUR