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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 $1,821 NZD
$1,023 USD
As of October 28, 2026
Save $1,141 NZD (39%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,534 NZD 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 28, 2026, with a 63% 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 28
Current: $3,534 NZD|Low: $1,544 NZD|High: $10,384 NZD|Avg: $3,988 NZD|-2.1%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 19, 2026
Retailer 5$1,821 NZD
Retailer 4$1,950 NZD
Retailer 2$2,332 NZD
Retailer 3$2,712 NZD
Retailer 6$2,963 NZD
Rare Carat$3,534 NZD
Retailer 7$5,698 NZD
Retailer 8$10,384 NZD

7 data points across 8 retailers

6 retailers$1,821 NZD to $2,963 NZD

B+
Cheapest Retailer
-
$1,821 NZD
$1,023 USD
B+
Retailer 2
-
$1,950 NZD
$1,095 USD
View
Final sale: no returns
B+
Retailer 3
-
$2,332 NZD
$1,310 USD
View
B
Retailer 4
-
$2,712 NZD
HK$11,900 HKD
View
B
Retailer 5
-
$2,963 NZD
$1,664 USD
View
Most Expensive
B
Rare Carat
SKJ16-455 · Oct 21
$3,534 NZD
$1,985 USD
View
Price last confirmed 8 days ago
5 more retailers have this diamond
Prices start from $1,821 NZDSave up to $1,141 NZD

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
$1,821 NZD