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 $878 USD
As of October 30, 2026
Save $5,202 USD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,080 USD 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 $878 to $6,080, a $5,202 spread on the same certified stone. Brilliant Earth lists it at $6,080. 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

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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: $6,080 USD|Low: $592 USD|High: $6,230 USD|Avg: $2,486 USD|-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$592 USD
Retailer 12$878 USD
Retailer 5$971 USD
Retailer 11$983 USD
Retailer 16$1,018 USD
Retailer 13$1,033 USD
Retailer 10$1,635 USD
Retailer 9$2,417 USD
Retailer 8$2,577 USD
Retailer 15$2,835 USD
Retailer 2$2,862 USD
Retailer 7$3,262 USD
Retailer 14$3,567 USD
Retailer 4$3,618 USD
Retailer 3$3,900 USD
Brilliant Earth$6,080 USD

26 data points across 16 retailers

13 retailers$878 USD to $6,080 USD

A
Cheapest Retailer
-
$878 USD
A
Retailer 2
-
$971 USD
View
A
Retailer 3
-
$983 USD
View
Final sale: no returns
A
Retailer 4
-
$1,018 USD
View
A
Retailer 5
-
$1,033 USD
£813 GBP
View
A
Retailer 6
-
$1,635 USD
View
A
Retailer 7
-
$2,417 USD
A$3,718 AUD
View
B+
Retailer 8
-
$2,835 USD
£2,232 GBP
View
B+
Retailer 9
-
$2,862 USD
View
B+
Retailer 10
-
$3,567 USD
View
Retailer 11
-
$3,618 USD
A$5,566 AUD
View
Price last confirmed 23 days ago
B+
Retailer 12
-
$3,900 USD
£3,071 GBP
View
Most Expensive
B
Brilliant Earth
21535490A · Oct 31
$6,080 USD
View
12 more retailers have this diamond
Prices start from $878 USDSave up to $5,202 USD

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
$878 USD