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Radiant|Natural|GIA

2.51ct K SI2 Radiant Natural Diamond

VG • K/SI2 • GIA 6421042796

Certificate GIA 6421042796

Diamond specifications and retailer prices

From $14,123 AUD
As of November 6, 2026
Save $3,629 AUD (20%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $17,752 AUD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 2.51ct natural radiant diamond

This 2.51ct natural radiant sits in the two to three carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6421042796. Listed at 2 retailers as of November 6, 2026, with prices from $14,123 to $17,752, a $3,629 spread on the same certified stone. 77 Diamonds lists it at $17,752. 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
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421042796
Dimensions8.17 × 6.65 × 4.89 mm
L/W Ratio1.23
Top View
8.17 mm6.65 mm2.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6421042796
Side View
Table 62.0%CrownGirdle: VTK-XTKPavilionCulet: NoneDepth 73.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $17,752 AUD|Low: $14,123 AUD|High: $18,036 AUD|Avg: $16,111 AUD|+0.8%
77 Diamonds
Retailer 2
November 7, 2026
Retailer 2$14,123 AUD
77 Diamonds$17,752 AUD

46 data points across 2 retailers

2 retailers$14,123 AUD to $17,752 AUD

A
Cheapest Retailer
-
$14,123 AUD
Most Expensive
B+
77 Diamonds
RADMBDGECHCBM · Nov 7
$17,752 AUD
£9,604 GBP
View
1 more retailer has this diamond
Prices start from $14,123 AUDSave up to $3,629 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 Radiant
$14,123 AUD