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Cushion|Lab Grown|GIA

2.58ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • GIA 7518174829

Shape and cutting style on the report: Cushion modified brilliant

Certificate GIA 7518174829

Diamond specifications and retailer prices

From £768 GBP
$1,023 USD
As of October 29, 2026
Save £376 GBP (33%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,491 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 2.58ct lab-grown cushion diamond

This 2.58ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7518174829. Listed at 6 retailers as of October 29, 2026, with a 49% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.58
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 7518174829
Dimensions9.24 × 7.38 × 5.06 mm
L/W Ratio1.25
Culet sizeNone
Key to symbols
Growth Remnant, Feather
Top View
9.24 mm7.38 mm2.58 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7518174829
Side View
Table 62.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 68.6%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: £1,491 GBP|Low: £651 GBP|High: £4,379 GBP|Avg: £1,682 GBP|-2.1%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 19, 2026
Retailer 5£768 GBP
Retailer 4£822 GBP
Retailer 2£984 GBP
Retailer 3£1,144 GBP
Retailer 6£1,250 GBP
Rare Carat£1,491 GBP
Retailer 7£2,403 GBP
Retailer 8£4,379 GBP

7 data points across 8 retailers

6 retailers£768 GBP to £1,144 GBP

B+
Cheapest Retailer
-
£768 GBP
$1,023 USD
B+
Retailer 2
-
£822 GBP
$1,095 USD
View
Final sale: no returns
B+
Retailer 3
-
£984 GBP
$1,310 USD
View
B
Retailer 4
-
£1,125 GBP
$1,498 USD
View
B
Retailer 5
-
£1,144 GBP
HK$11,900 HKD
View
Most Expensive
Rare Carat
SKJ16-455 · Oct 21
£1,491 GBP
$1,985 USD
View
Price last confirmed 8 days ago
5 more retailers have this diamond
Prices start from £768 GBPSave up to £376 GBP

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+
2.58ct Cushion
£768 GBP