Radiant|Natural|GIA

2.51ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 2536319658

Certificate GIA 2536319658

Diamond specifications and retailer prices

From €17,705 EUR
$19,780 USD
As of October 30, 2026
Save €6,154 EUR (26%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €31,811 EUR at MOH London · As of October 19, 2026
View at MOH London

About this 2.51ct natural radiant diamond

This 2.51ct natural radiant sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2536319658. Listed at 9 retailers as of October 30, 2026, with a 35% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2536319658
Dimensions8.91 × 6.93 × 4.67 mm
L/W Ratio1.29
Top View
8.91 mm6.93 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2536319658
Side View
Table 67.0%CrownGirdle: UNDPavilionCulet: NoneDepth 67.4%

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: Oct 30
Current: €31,811 EUR|Low: €17,705 EUR|High: €32,024 EUR|Avg: €22,472 EUR|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 5€17,705 EUR
Retailer 2€18,968 EUR
Retailer 6€21,305 EUR
Retailer 4€21,408 EUR
Retailer 3€23,859 EUR
MOH London€31,811 EUR

35 data points across 6 retailers

9 retailers€17,705 EUR to €23,859 EUR

A
Cheapest Retailer
-
€17,705 EUR
$19,780 USD
A
Retailer 2
-
€18,968 EUR
₹2,018,175 INR
View
B+
Retailer 3
-
€19,115 EUR
$21,355 USD
View
B+
Retailer 4
-
€19,396 EUR
A$33,337 AUD
View
Retailer 5
-
€21,408 EUR
£18,832 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
€21,957 EUR
$24,530 USD
View
Price last confirmed 13 days ago
Retailer 7
-
€22,691 EUR
$25,350 USD
View
Price last confirmed 13 days ago
B
Retailer 8
-
€23,859 EUR
View
Most Expensive
MOH London
16F55B223 · Oct 19
€31,811 EUR
£27,984 GBP
View
Price last confirmed 13 days ago
8 more retailers have this diamond
Prices start from €17,705 EURSave up to €6,154 EUR

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 Radiant
€17,705 EUR