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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1549103009

Certificate GIA 1549103009

Diamond specifications and retailer prices

From $35,028 AUD
$24,605 USD
As of November 1, 2026
Save $20,800 AUD (37%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $55,828 AUD at Cape Diamonds · As of October 27, 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 1549103009. Listed at 13 retailers as of October 27, 2026, with prices from $35,028 to $55,828, a $20,800 spread on the same certified stone. Cape Diamonds lists it at $55,828. 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 angle32.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1549103009
Dimensions8.94 × 8.88 × 5.21 mm
L/W Ratio1.01
Girdle conditionMedium
Key to symbols
Cloud, Feather, Crystal, Needle
Top View
8.94 mm8.88 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549103009
Side View
Table 61.0%Crown 32.5°Girdle: MediumPavilion 41°Culet: NoneDepth 58.4%

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: $55,828 AUD|Low: $35,028 AUD|High: $61,702 AUD|Avg: $43,978 AUD|+1.4%
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 10$35,028 AUD
Retailer 11$35,412 AUD
Retailer 2$37,629 AUD
Retailer 7$37,673 AUD
Retailer 4$38,338 AUD
Retailer 8$40,879 AUD
Retailer 9$41,353 AUD
Retailer 5$44,190 AUD
Retailer 3$47,181 AUD
Retailer 6$47,405 AUD
Cape Diamonds$55,828 AUD
Retailer 12$61,621 AUD

36 data points across 12 retailers

13 retailers$35,028 AUD to $55,828 AUD

B+
Cheapest Retailer
-
$35,028 AUD
$24,605 USD
B+
Retailer 2
-
$35,412 AUD
$24,875 USD
View
B+
Retailer 3
-
$37,629 AUD
₹2,517,370 INR
View
B
Retailer 4
-
$37,673 AUD
$26,463 USD
View
B+
Retailer 5
-
$38,537 AUD
View
B
Retailer 6
-
$40,879 AUD
$28,715 USD
View
Retailer 7
-
$40,879 AUD
$28,715 USD
View
Price last confirmed 12 days ago
Retailer 8
-
$41,099 AUD
$28,870 USD
View
Price last confirmed 43 days ago
B
Retailer 9
-
$41,353 AUD
$29,048 USD
View
B
Retailer 10
-
$44,190 AUD
£24,442 GBP
View
Retailer 11
-
$47,181 AUD
$33,142 USD
View
Price last confirmed 39 days ago
B
Retailer 12
-
$47,405 AUD
€31,714 EUR
View
Most Expensive
B
Cape Diamonds
cert_1549103009 · Oct 27
$55,828 AUD
ZAR 633,536 ZAR
View
12 more retailers have this diamond
Prices start from $35,028 AUDSave up to $20,800 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
$35,028 AUD