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Oval|Natural|GIA

2.51ct K SI2 Oval Natural Diamond

EX • K/SI2 • GIA 1545370424

Certificate GIA 1545370424

Diamond specifications and retailer prices

From $12,633 AUD
As of November 5, 2026
Save $3,924 AUD (24%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $20,475 AUD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 2.51ct natural oval diamond

This 2.51ct natural oval sits in the two to three carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1545370424. Listed at 8 retailers as of November 5, 2026, with a 31% 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.92°
OriginNatural
Grading LabGIA
CertificateGIA 1545370424
Dimensions11.10 × 7.13 × 4.68 mm
L/W Ratio1.56
Girdle conditionVery Thick
Key to symbols
Twinning Wisp, Feather, Needle, Indented Natural
Top View
11.10 mm7.13 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545370424
Side View
Table 61.0%Crown 38.92°GirdlePavilionCuletDepth 65.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $20,475 AUD|Low: $12,633 AUD|High: $21,163 AUD|Avg: $15,999 AUD|-3.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 2$12,633 AUD
Retailer 5$12,770 AUD
Retailer 6$14,603 AUD
Retailer 8$14,836 AUD
Retailer 7$15,065 AUD
Retailer 3$16,557 AUD
Retailer 4$19,287 AUD
NZ Jewellers$20,475 AUD

41 data points across 8 retailers

8 retailers$12,633 AUD to $16,557 AUD

A
Cheapest Retailer
-
$12,633 AUD
Retailer 2
-
$12,770 AUD
View
Price last confirmed 8 days ago
Retailer 3
-
$14,603 AUD
View
Price last confirmed 9 days ago
Retailer 4
-
$14,836 AUD
View
Price last confirmed 11 days ago
Retailer 5
-
$15,065 AUD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$16,557 AUD
View
Retailer 7
-
$19,287 AUD
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
0562b1d5-55da-4933-927f-2fa430b289dc · Oct 27
$20,475 AUD
$14,068 USD
View
Price last confirmed 10 days ago
7 more retailers have this diamond
Prices start from $12,633 AUDSave up to $3,924 AUD

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
2.51ct Oval
$12,633 AUD