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Radiant|Lab Grown|IGI

2.57ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG685528891

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

Certificate IGI LG685528891

Diamond specifications and retailer prices

From €786 EUR
$878 USD
As of October 30, 2026
Save €4,656 EUR (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €5,442 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG685528891 or 685528891. Listed at 13 retailers as of October 30, 2026, with prices from €786 to €5,442, a €4,656 spread on the same certified stone. Brilliant Earth lists it at €5,442. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.57
Carat
E
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685528891
Dimensions9.98 × 6.61 × 4.39 mm
L/W Ratio1.51
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.98 mm6.61 mm2.57 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685528891
Side View
Table 63.0%Crown 42.6°Girdle: MediumPavilion 34.5°Culet: NoneDepth 66.4%

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 30
Current: €5,442 EUR|Low: €530 EUR|High: €5,576 EUR|Avg: €2,225 EUR|-2.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 6€530 EUR
Retailer 15€786 EUR
Retailer 2€855 EUR
Retailer 14€880 EUR
Retailer 4€911 EUR
Retailer 10€922 EUR
Retailer 13€1,463 EUR
Retailer 12€2,163 EUR
Retailer 8€2,306 EUR
Retailer 3€2,537 EUR
Retailer 11€2,562 EUR
Retailer 7€2,920 EUR
Retailer 16€3,193 EUR
Retailer 5€3,238 EUR
Retailer 9€3,416 EUR
Brilliant Earth€5,442 EUR

26 data points across 16 retailers

13 retailers€786 EUR to €5,442 EUR

A
Cheapest Retailer
-
€786 EUR
$878 USD
A
Retailer 2
-
€855 EUR
$955 USD
View
A
Retailer 3
-
€880 EUR
$983 USD
View
Final sale: no returns
A
Retailer 4
-
€911 EUR
$1,018 USD
View
A
Retailer 5
-
€922 EUR
£811 GBP
View
A
Retailer 6
-
€1,463 EUR
$1,635 USD
View
A
Retailer 7
-
€2,163 EUR
A$3,718 AUD
View
B+
Retailer 8
-
€2,537 EUR
£2,232 GBP
View
B+
Retailer 9
-
€2,562 EUR
$2,862 USD
View
B+
Retailer 10
-
€3,193 EUR
$3,567 USD
View
Retailer 11
-
€3,238 EUR
A$5,566 AUD
View
Price last confirmed 25 days ago
B+
Retailer 12
-
€3,416 EUR
£3,005 GBP
View
Most Expensive
B
Brilliant Earth
21535490A · Oct 31
€5,442 EUR
$6,080 USD
View
12 more retailers have this diamond
Prices start from €786 EURSave up to €4,656 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
2.57ct Radiant
€786 EUR