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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2235674968

Certificate GIA 2235674968

Diamond specifications and retailer prices

From $30,721 AUD
$21,580 USD
As of November 1, 2026
Save $20,323 AUD (40%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $51,044 AUD at Cape Diamonds · As of November 1, 2026
View at Cape Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2235674968. Listed at 12 retailers as of November 1, 2026, with prices from $30,721 to $51,044, a $20,323 spread on the same certified stone. Cape Diamonds lists it at $51,044. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2235674968
Dimensions8.61 × 8.65 × 5.41 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.61 mm8.65 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235674968
Side View
Table 56.0%Crown 35.5°Girdle: STK-STKPavilion 40.8°Culet: NoneDepth 62.7%

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 1
Current: $51,044 AUD|Low: $30,721 AUD|High: $51,044 AUD|Avg: $38,933 AUD|+2.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 6$30,721 AUD
Retailer 8$33,608 AUD
Retailer 10$35,932 AUD
Retailer 2$37,245 AUD
Retailer 7$37,791 AUD
Retailer 12$37,950 AUD
Retailer 3$39,149 AUD
Retailer 11$39,149 AUD
Retailer 4$40,444 AUD
Retailer 5$42,008 AUD
Retailer 9$42,396 AUD
Cape Diamonds$51,044 AUD

43 data points across 12 retailers

12 retailers$30,721 AUD to $51,044 AUD

B+
Cheapest Retailer
-
$30,721 AUD
$21,580 USD
B+
Retailer 2
-
$33,608 AUD
$23,608 USD
View
B
Retailer 3
-
$35,932 AUD
$25,240 USD
View
B+
Retailer 4
-
$37,245 AUD
£20,600 GBP
View
B+
Retailer 5
-
$37,791 AUD
$26,546 USD
View
B
Retailer 6
-
$37,950 AUD
$26,658 USD
View
B
Retailer 7
-
$39,149 AUD
$27,500 USD
View
B
Retailer 8
-
$39,149 AUD
$27,500 USD
View
B
Retailer 9
-
$40,444 AUD
$28,410 USD
View
B
Retailer 10
-
$42,008 AUD
€28,103 EUR
View
B
Retailer 11
-
$42,396 AUD
$29,781 USD
View
Most Expensive
B
Cape Diamonds
cert_2235674968 · Nov 1
$51,044 AUD
ZAR 579,252 ZAR
View
11 more retailers have this diamond
Prices start from $30,721 AUDSave up to $20,323 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.

B+
2.51ct Round
$30,721 AUD