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Radiant|Natural|GIA

2.50ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 1

Certificate GIA 1

Diamond specifications and retailer prices

From $43,419 NZD
$24,471 USD
As of October 31, 2026
Save $7,798 NZD (15%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $51,217 NZD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 2.5ct natural radiant diamond

This 2.5ct natural radiant 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. Listed at 3 retailers as of October 31, 2026, with prices from $43,419 to $51,217, a $7,798 spread on the same certified stone. Blue Nile lists it at $51,217. 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

2.50
Carat
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1
Dimensions8.69 × 6.89 × 4.74 mm
L/W Ratio1.26
Top View
8.69 mm6.89 mm2.50 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.9%

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: Oct 31
Current: $51,217 NZD|Low: $42,991 NZD|High: $56,520 NZD|Avg: $50,722 NZD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
September 23, 2026
Retailer 2$43,419 NZD
Retailer 6$46,629 NZD
Blue Nile$51,217 NZD
Retailer 3$52,335 NZD
Retailer 4$54,427 NZD
Retailer 5$56,520 NZD

2 data points across 6 retailers

3 retailers$43,419 NZD to $51,217 NZD

A
Cheapest Retailer
-
$43,419 NZD
$24,471 USD
A
Retailer 2
-
$46,629 NZD
$26,280 USD
View
Most Expensive
B+
Blue Nile
29829294 · Oct 31
$51,217 NZD
$28,866 USD
View
2 more retailers have this diamond
Prices start from $43,419 NZDSave up to $7,798 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.

A
2.50ct Radiant
$43,419 NZD