Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1558302144

Certificate GIA 1558302144

Diamond specifications and retailer prices

From $21,195 USD
As of November 1, 2026
Save $9,583 USD (31%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $30,778 USD at Diamonds Direct · As of October 31, 2026
View at Diamonds Direct

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1558302144. Listed at 13 retailers as of October 31, 2026, with prices from $21,195 to $30,778, a $9,583 spread on the same certified stone. Diamonds Direct lists it at $30,778. 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
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1558302144
Dimensions8.60 × 8.64 × 5.41 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.60 mm8.64 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558302144
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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 1
Current: $30,778 USD|Low: $20,497 USD|High: $38,267 USD|Avg: $25,615 USD|-4.2%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 2$21,195 USD
Retailer 9$21,954 USD
Retailer 14$22,047 USD
Retailer 4$22,502 USD
Retailer 5$23,202 USD
Retailer 8$23,388 USD
Retailer 10$24,064 USD
Retailer 12$25,378 USD
Retailer 15$25,710 USD
Retailer 11$25,752 USD
Retailer 6$26,075 USD
Retailer 13$26,170 USD
Retailer 16$26,560 USD
Retailer 3$28,984 USD
Diamonds Direct$30,778 USD
Retailer 7$37,501 USD

38 data points across 16 retailers

13 retailers$21,195 USD to $30,778 USD

B+
Cheapest Retailer
-
$21,195 USD
B+
Retailer 2
-
$21,954 USD
View
B+
Retailer 3
-
$22,047 USD
SGD 29,793 SGD
View
Retailer 4
-
$23,388 USD
View
Price last confirmed 26 days ago
B
Retailer 5
-
$24,064 USD
View
B
Retailer 6
-
$25,378 USD
View
B
Retailer 7
-
$25,710 USD
View
B
Retailer 8
-
$25,752 USD
View
B+
Retailer 9
-
$26,170 USD
View
B
Retailer 10
-
$26,560 USD
View
B
Retailer 11
-
$27,824 USD
View
B
Retailer 12
-
$28,984 USD
View
Most Expensive
B
Diamonds Direct
1136884 · Oct 31
$30,778 USD
View
12 more retailers have this diamond
Prices start from $21,195 USDSave up to $9,583 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.

B+
2.51ct Round
$21,195 USD