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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2544271085

Certificate GIA 2544271085

Diamond specifications and retailer prices

From $30,949 AUD
$21,740 USD
As of November 1, 2026
Save $24,926 AUD (45%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $55,875 AUD at MOH London · As of November 1, 2026
View at MOH London

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 2544271085. Listed at 17 retailers as of November 1, 2026, with prices from $30,949 to $55,875, a $24,926 spread on the same certified stone. MOH London lists it at $55,875. 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 angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2544271085
Dimensions8.59 × 8.65 × 5.40 mm
L/W Ratio1.01
Top View
8.59 mm8.65 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2544271085
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: $55,875 AUD|Low: $23,509 AUD|High: $56,550 AUD|Avg: $38,536 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 3$30,949 AUD
Retailer 6$32,488 AUD
Retailer 5$34,286 AUD
Retailer 7$34,835 AUD
Retailer 14$35,778 AUD
Retailer 2$36,093 AUD
Retailer 4$36,628 AUD
Retailer 13$37,566 AUD
Retailer 11$38,759 AUD
Retailer 8$40,030 AUD
Retailer 12$40,249 AUD
Retailer 9$43,217 AUD
Retailer 10$49,472 AUD
Retailer 15$50,684 AUD
MOH London$55,875 AUD

32 data points across 15 retailers

17 retailers$30,949 AUD to $55,875 AUD

B+
Cheapest Retailer
-
$30,949 AUD
$21,740 USD
B+
Retailer 2
-
$32,488 AUD
$22,821 USD
View
B+
Retailer 3
-
$32,573 AUD
$22,881 USD
View
B+
Retailer 4
-
$34,286 AUD
$24,084 USD
View
Final sale: no returns
B+
Retailer 5
-
$34,835 AUD
$24,470 USD
View
B
Retailer 6
-
$35,778 AUD
$25,132 USD
View
B+
Retailer 7
-
$36,093 AUD
£19,963 GBP
View
B
Retailer 8
-
$36,628 AUD
$25,729 USD
View
B
Retailer 9
-
$37,566 AUD
$26,388 USD
View
B
Retailer 10
-
$38,242 AUD
$26,863 USD
View
B
Retailer 11
-
$38,759 AUD
$27,226 USD
View
B+
Retailer 12
-
$40,030 AUD
£22,141 GBP
View
B
Retailer 13
-
$40,249 AUD
$28,273 USD
View
B
Retailer 14
-
$43,217 AUD
€28,912 EUR
View
B
Retailer 15
-
$49,472 AUD
ZAR 561,411 ZAR
View
B
Retailer 16
-
$50,684 AUD
$35,603 USD
View
Most Expensive
B
MOH London
374279A59 · Nov 1
$55,875 AUD
£30,905 GBP
View
16 more retailers have this diamond
Prices start from $30,949 AUDSave up to $24,926 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
$30,949 AUD