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Radiant|Natural|GIA

2.51ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 6491920108

Certificate GIA 6491920108

Diamond specifications and retailer prices

From $23,994 NZD
As of November 6, 2026
Save $6,783 NZD (22%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $30,777 NZD 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6491920108. Listed at 5 retailers as of November 6, 2026, with prices from $23,994 to $30,777, a $6,783 spread on the same certified stone. 77 Diamonds lists it at $30,777. 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6491920108
Dimensions8.97 × 6.82 × 4.40 mm
L/W Ratio1.32
Top View
8.97 mm6.82 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6491920108
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 64.5%

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 6
Current: $30,777 NZD|Low: $23,994 NZD|High: $31,392 NZD|Avg: $26,858 NZD|+0.5%
77 Diamonds
Retailer 2
Retailer 3
November 7, 2026
Retailer 3$23,994 NZD
Retailer 2$25,118 NZD
77 Diamonds$30,777 NZD

44 data points across 3 retailers

5 retailers$23,994 NZD to $30,777 NZD

B+
Cheapest Retailer
-
$23,994 NZD
B+
Retailer 2
-
$25,118 NZD
View
B+
Retailer 3
-
$25,493 NZD
View
B+
Retailer 4
-
$25,666 NZD
View
Most Expensive
B
77 Diamonds
RADZSCSCKRW3 · Nov 7
$30,777 NZD
£13,434 GBP
View
4 more retailers have this diamond
Prices start from $23,994 NZDSave up to $6,783 NZD

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 Radiant
$23,994 NZD