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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2556787346

Certificate GIA 2556787346

Diamond specifications and retailer prices

From $11,411 USD
As of November 4, 2026
Save $8,800 USD (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $20,211 USD at MOH London · As of November 4, 2026
View at MOH London

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556787346. Listed at 10 retailers as of November 4, 2026, with prices from $11,411 to $20,211, a $8,800 spread on the same certified stone. MOH London lists it at $20,211. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556787346
Dimensions8.60 × 5.41 × 5.41 mm
L/W Ratio1.59
Culet sizeNone
Top View
8.60 mm5.41 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556787346
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 40.6°Culet: NoneDepth 62.6%

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: $20,211 USD|Low: $10,898 USD|High: $20,509 USD|Avg: $13,818 USD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3$10,898 USD
Retailer 5$11,411 USD
Retailer 11$11,725 USD
Retailer 9$12,040 USD
Retailer 8$12,976 USD
Retailer 2$13,616 USD
Retailer 7$13,901 USD
Retailer 10$14,057 USD
Retailer 6$15,519 USD
Retailer 4$15,603 USD
MOH London$20,211 USD

33 data points across 11 retailers

10 retailers$11,411 USD to $20,211 USD

A
Cheapest Retailer
-
$11,411 USD
A
Retailer 2
-
$12,040 USD
View
Retailer 3
-
$12,976 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$13,503 USD
View
B+
Retailer 5
-
$13,616 USD
View
B+
Retailer 6
-
$13,901 USD
View
B+
Retailer 7
-
$14,057 USD
View
B+
Retailer 8
-
$15,519 USD
View
B+
Retailer 9
-
$15,603 USD
View
Most Expensive
B
MOH London
44FDDC741 · Nov 4
$20,211 USD
£15,914 GBP
View
9 more retailers have this diamond
Prices start from $11,411 USDSave up to $8,800 USD

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
$11,411 USD