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Round|Natural|GIA

2.51ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 5242015916

Certificate GIA 5242015916

Diamond specifications and retailer prices

From $18,728 NZD
As of November 5, 2026
Save $5,157 NZD (22%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $28,993 NZD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242015916. Listed at 13 retailers as of November 5, 2026, with a 28% 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

2.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5242015916
Dimensions8.70 × 8.63 × 5.40 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
8.70 mm8.63 mm2.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242015916
Side View
Table 58.0%Crown 34°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 62.3%

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: Nov 5
Current: $19,906 NZD|Low: $18,728 NZD|High: $24,053 NZD|Avg: $20,581 NZD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$18,728 NZD
Retailer 6$18,954 NZD
Retailer 5$19,201 NZD
Retailer 1$19,906 NZD
Retailer 3$21,774 NZD
Retailer 2$23,885 NZD

44 data points across 6 retailers

13 retailers$18,728 NZD to $23,885 NZD

B+
Cheapest Retailer
-
$18,728 NZD
B+
Retailer 2
-
$18,954 NZD
View
Retailer 3
-
$19,201 NZD
View
Price last confirmed 12 days ago
Retailer 4
-
$19,201 NZD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$19,906 NZD
View
Retailer 6
-
$20,801 NZD
View
Price last confirmed 36 days ago
Retailer 7
-
$21,121 NZD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$21,774 NZD
View
B
Retailer 9
-
$23,885 NZD
View
Retailer 10
-
$24,001 NZD
View
Price last confirmed 59 days ago
Retailer 11
-
$24,001 NZD
View
Price last confirmed 38 days ago
Retailer 12
-
$28,993 NZD
View
Price last confirmed 69 days ago
Most Expensive
NZ Jewellers
5ccf45e2-24c4-4b0c-8144-392015112acd · Sep 27
$28,993 NZD
$16,298 USD
View
Price last confirmed 40 days ago
12 more retailers have this diamond
Prices start from $18,728 NZDSave up to $5,157 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+
2.51ct Round
$18,728 NZD