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Round|Natural|GIA

2.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2414737837

Certificate GIA 2414737837

Diamond specifications and retailer prices

From $26,486 AUD
$18,605 USD
As of October 25, 2026
Save $21,344 AUD (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $47,830 AUD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2414737837. Listed at 15 retailers as of October 25, 2026, with prices from $26,486 to $47,830, a $21,344 spread on the same certified stone. Diamond Quarter lists it at $47,830. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2414737837
Dimensions8.77 × 8.70 × 5.35 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
8.77 mm8.70 mm2.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2414737837
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.3%

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 25
Current: $30,886 AUD|Low: $26,486 AUD|High: $47,732 AUD|Avg: $34,133 AUD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 5$26,486 AUD
Retailer 6$27,762 AUD
Retailer 1$30,886 AUD
Retailer 7$31,709 AUD
Retailer 3$34,851 AUD
Retailer 2$36,643 AUD
Retailer 4$47,416 AUD

43 data points across 7 retailers

15 retailers$26,486 AUD to $47,830 AUD

A
Cheapest Retailer
-
$26,486 AUD
$18,605 USD
B+
Retailer 2
-
$27,762 AUD
$19,501 USD
View
B+
Retailer 3
-
$30,199 AUD
$21,213 USD
View
B+
Retailer 4
-
$30,886 AUD
£17,083 GBP
View
B+
Retailer 5
-
$31,709 AUD
$22,274 USD
View
B+
Retailer 6
-
$32,672 AUD
$22,950 USD
View
B+
Retailer 7
-
$32,672 AUD
$22,950 USD
View
B+
Retailer 8
-
$32,716 AUD
$22,981 USD
View
B
Retailer 9
-
$33,754 AUD
$23,710 USD
View
B
Retailer 10
-
$33,974 AUD
$23,865 USD
View
B+
Retailer 11
-
$34,851 AUD
£19,276 GBP
View
B
Retailer 12
-
$36,643 AUD
€24,514 EUR
View
B
Retailer 13
-
$42,782 AUD
$30,052 USD
View
B
Retailer 14
-
$47,416 AUD
£26,226 GBP
View
Most Expensive
B
Diamond Quarter
2.51SI2H2437B93DN · Oct 29
$47,830 AUD
£26,455 GBP
View
14 more retailers have this diamond
Prices start from $26,486 AUDSave up to $21,344 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 Round
$26,486 AUD