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Round|Natural|GIA

2.51ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1547670666

Certificate GIA 1547670666

Diamond specifications and retailer prices

From $10,372 AUD
As of November 4, 2026
Save $2,631 AUD (20%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $13,004 AUD at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1547670666. Listed at 5 retailers as of November 4, 2026, with prices from $10,372 to $13,004, a $2,631 spread on the same certified stone. The Diamond Guys lists it at $13,004. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1547670666
Dimensions8.67 × 8.71 × 5.38 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.67 mm8.71 mm2.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1547670666
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $12,125 AUD|Low: $8,392 AUD|High: $15,304 AUD|Avg: $12,240 AUD|-7.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
The Diamond Guys
November 5, 2026
Retailer 6$8,392 AUD
Retailer 4$10,372 AUD
Retailer 3$11,957 AUD
Retailer 1$12,125 AUD
Retailer 2$12,315 AUD
The Diamond Guys$13,004 AUD
Retailer 5$15,304 AUD

27 data points across 7 retailers

5 retailers$10,372 AUD to $13,004 AUD

A
Cheapest Retailer
-
$10,372 AUD
B+
Retailer 2
-
$11,957 AUD
View
B+
Retailer 3
-
$12,125 AUD
View
B+
Retailer 4
-
$12,315 AUD
View
Most Expensive
B+
The Diamond Guys
1922550695 · Nov 6
$13,004 AUD
$9,103 USD
View
4 more retailers have this diamond
Prices start from $10,372 AUDSave up to $2,631 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
$10,372 AUD