CaratHunter
Plans
Oval|Natural|GIA

2.51ct K SI2 Oval Natural Diamond

EX • K/SI2 • GIA 1543542521

Certificate GIA 1543542521

Diamond specifications and retailer prices

From $7,930 USD
As of November 5, 2026
Save $2,334 USD (23%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $15,117 USD 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 1543542521. Listed at 7 retailers as of November 5, 2026, with a 29% 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
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle39.36°
Pavilion angle39.99°
OriginNatural
Grading LabGIA
CertificateGIA 1543542521
Dimensions10.46 × 7.54 × 4.86 mm
L/W Ratio1.39
Girdle conditionVery Thick
Key to symbols
Twinning Wisp, Feather, Crystal, Indented Natural
Top View
10.46 mm7.54 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1543542521
Side View
Table 57.0%Crown 39.36°GirdlePavilion 39.99°CuletDepth 64.4%

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: Nov 5
Current: $15,117 USD|Low: $7,930 USD|High: $15,157 USD|Avg: $10,349 USD|-0.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7$7,930 USD
Retailer 3$8,963 USD
Retailer 6$9,038 USD
Retailer 8$9,146 USD
Retailer 5$9,177 USD
Retailer 2$10,264 USD
Retailer 4$12,663 USD
NZ Jewellers$15,117 USD

42 data points across 8 retailers

7 retailers$7,930 USD to $10,264 USD

A
Cheapest Retailer
-
$7,930 USD
Retailer 2
-
$8,963 USD
View
Price last confirmed 7 days ago
Retailer 3
-
$9,038 USD
View
Price last confirmed 8 days ago
Retailer 4
-
$9,177 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$10,264 USD
View
Retailer 6
-
$12,663 USD
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
f42a446c-f8e2-4e46-9ea2-0c7ba5ecfc6c · Oct 27
$15,117 USD
View
Price last confirmed 10 days ago
6 more retailers have this diamond
Prices start from $7,930 USDSave up to $2,334 USD

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
$7,930 USD