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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 $18,709 CAD
As of November 6, 2026
Save $5,289 CAD (22%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $23,998 CAD 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 $18,709 to $23,998, a $5,289 spread on the same certified stone. 77 Diamonds lists it at $23,998. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $23,998 CAD|Low: $18,709 CAD|High: $24,478 CAD|Avg: $20,943 CAD|+0.5%
77 Diamonds
Retailer 2
Retailer 3
November 7, 2026
Retailer 3$18,709 CAD
Retailer 2$19,585 CAD
77 Diamonds$23,998 CAD

44 data points across 3 retailers

5 retailers$18,709 CAD to $23,998 CAD

B+
Cheapest Retailer
-
$18,709 CAD
B+
Retailer 2
-
$19,585 CAD
View
B+
Retailer 3
-
$19,878 CAD
View
B+
Retailer 4
-
$20,013 CAD
View
Most Expensive
B
77 Diamonds
RADZSCSCKRW3 · Nov 7
$23,998 CAD
£13,434 GBP
View
4 more retailers have this diamond
Prices start from $18,709 CADSave up to $5,289 CAD

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
$18,709 CAD