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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 HK$6,889 HKD
$878 USD
As of November 2, 2026
Save HK$40,815 HKD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$47,704 HKD 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 31, 2026, with prices from HK$6,889 to HK$47,704, a HK$40,815 spread on the same certified stone. Brilliant Earth lists it at HK$47,704. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$47,704 HKD|Low: HK$4,644 HKD|High: HK$48,881 HKD|Avg: HK$19,472 HKD|-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 2, 2026
Retailer 6HK$4,644 HKD
Retailer 15HK$6,889 HKD
Retailer 9HK$7,493 HKD
Retailer 14HK$7,713 HKD
Retailer 4HK$7,987 HKD
Retailer 2HK$8,078 HKD
Retailer 13HK$12,828 HKD
Retailer 12HK$18,962 HKD
Retailer 8HK$20,216 HKD
Retailer 3HK$22,241 HKD
Retailer 11HK$22,456 HKD
Retailer 7HK$25,594 HKD
Retailer 16HK$27,986 HKD
Retailer 5HK$28,386 HKD
Retailer 10HK$29,943 HKD
Brilliant EarthHK$47,704 HKD

27 data points across 16 retailers

13 retailersHK$6,889 HKD to HK$47,704 HKD

A
Cheapest Retailer
-
HK$6,889 HKD
$878 USD
A
Retailer 2
-
HK$7,493 HKD
$955 USD
View
A
Retailer 3
-
HK$7,713 HKD
$983 USD
View
Final sale: no returns
A
Retailer 4
-
HK$7,987 HKD
$1,018 USD
View
A
Retailer 5
-
HK$8,078 HKD
£811 GBP
View
A
Retailer 6
-
HK$12,828 HKD
$1,635 USD
View
A
Retailer 7
-
HK$18,962 HKD
A$3,718 AUD
View
B+
Retailer 8
-
HK$22,241 HKD
£2,232 GBP
View
B+
Retailer 9
-
HK$22,456 HKD
$2,862 USD
View
B+
Retailer 10
-
HK$27,986 HKD
$3,567 USD
View
Retailer 11
-
HK$28,386 HKD
A$5,566 AUD
View
Price last confirmed 25 days ago
B+
Retailer 12
-
HK$29,943 HKD
£3,005 GBP
View
Most Expensive
B
Brilliant Earth
21535490A · Oct 31
HK$47,704 HKD
$6,080 USD
View
12 more retailers have this diamond
Prices start from HK$6,889 HKDSave up to HK$40,815 HKD

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
HK$6,889 HKD