CaratHunter
Plans
Marquise|Natural|GIA

2.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 6565739246

Certificate GIA 6565739246

Diamond specifications and retailer prices

From $27,565 AUD
SGD 26,106 SGD
As of November 2, 2026
Save $23,901 AUD (46%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $51,467 AUD at With Clarity · As of November 2, 2026
View at With Clarity

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6565739246. Listed at 10 retailers as of November 2, 2026, with prices from $27,565 to $51,467, a $23,901 spread on the same certified stone. With Clarity lists it at $51,467. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

2.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565739246
Dimensions12.85 × 6.95 × 4.52 mm
L/W Ratio1.85
Top View
12.85 mm6.95 mm2.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565739246
Side View
Table 57.0%CrownGirdle: THN-VTKPavilionCulet: NDepth 65.1%

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: Nov 2
Current: $36,890 AUD|Low: $27,565 AUD|High: $51,467 AUD|Avg: $32,373 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
With Clarity
November 3, 2026
Retailer 9$27,565 AUD
Retailer 6$29,722 AUD
Retailer 2$29,898 AUD
Retailer 4$30,086 AUD
Retailer 5$30,098 AUD
Retailer 3$30,938 AUD
Retailer 7$31,457 AUD
Retailer 8$35,424 AUD
Retailer 1$36,890 AUD
With Clarity$51,467 AUD

6 data points across 10 retailers

10 retailers$27,565 AUD to $51,467 AUD

A
Cheapest Retailer
-
$27,565 AUD
SGD 26,106 SGD
B+
Retailer 2
-
$29,722 AUD
$20,830 USD
View
A
Retailer 3
-
$29,898 AUD
£16,499 GBP
View
B+
Retailer 4
-
$30,086 AUD
$21,085 USD
View
B+
Retailer 5
-
$30,098 AUD
$21,093 USD
View
A
Retailer 6
-
$30,938 AUD
$21,682 USD
View
B+
Retailer 7
-
$31,457 AUD
$22,046 USD
View
B+
Retailer 8
-
$35,424 AUD
$24,826 USD
View
B+
Retailer 9
-
$36,890 AUD
$25,853 USD
View
Most Expensive
B
With Clarity
6565739246 · Nov 2
$51,467 AUD
$36,069 USD
View
9 more retailers have this diamond
Prices start from $27,565 AUDSave up to $23,901 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 Marquise
$27,565 AUD