Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5516107542

Certificate GIA 5516107542

Diamond specifications and retailer prices

From $12,385 USD
As of November 1, 2026
Save $9,394 USD (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $21,779 USD at MOH London · As of November 2, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5516107542. Listed at 13 retailers as of November 1, 2026, with prices from $12,385 to $21,779, a $9,394 spread on the same certified stone. MOH London lists it at $21,779. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5516107542
Dimensions8.71 × 8.67 × 5.41 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
8.71 mm8.67 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5516107542
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.3%

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 1
Current: $21,779 USD|Low: $12,385 USD|High: $22,041 USD|Avg: $17,329 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$12,385 USD
Retailer 3$14,643 USD
Retailer 6$14,875 USD
Retailer 4$17,456 USD
Retailer 2$19,149 USD
Retailer 7$19,756 USD
MOH London$21,779 USD

43 data points across 7 retailers

13 retailers$12,385 USD to $21,779 USD

A
Cheapest Retailer
-
$12,385 USD
A
Retailer 2
-
$12,938 USD
View
B+
Retailer 3
-
$13,695 USD
View
Retailer 4
-
$13,945 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$14,061 USD
View
B+
Retailer 6
-
$14,643 USD
View
B+
Retailer 7
-
$14,875 USD
View
B+
Retailer 8
-
$15,107 USD
View
B+
Retailer 9
-
$15,688 USD
View
B
Retailer 10
-
$17,456 USD
View
B
Retailer 11
-
$19,149 USD
View
B
Retailer 12
-
$19,756 USD
View
Most Expensive
B
MOH London
3665BC12E · Nov 2
$21,779 USD
£17,149 GBP
View
12 more retailers have this diamond
Prices start from $12,385 USDSave up to $9,394 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
$12,385 USD