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Radiant|Natural|GIA

5.21ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 5151132821

Certificate GIA 5151132821

Diamond specifications and retailer prices

From €80,705 EUR
$90,164 USD
As of October 31, 2026
Save €20,477 EUR (20%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €101,182 EUR at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

About this 5.21ct natural radiant diamond

This 5.21ct natural radiant sits in the over five 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 5151132821. Listed at 6 retailers as of October 30, 2026, with prices from €80,705 to €101,182, a €20,477 spread on the same certified stone. 77 Diamonds lists it at €101,182. 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

5.21
Carat
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5151132821
Dimensions9.87 × 9.10 × 6.23 mm
L/W Ratio1.08
Top View
9.87 mm9.10 mm5.21 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5151132821
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.5%

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: Oct 31
Current: €101,182 EUR|Low: €79,859 EUR|High: €101,733 EUR|Avg: €92,188 EUR|+1.5%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 3€80,705 EUR
Retailer 4€84,298 EUR
Retailer 2€88,377 EUR
Retailer 5€95,963 EUR
Retailer 7€95,963 EUR
Retailer 6€99,167 EUR
77 Diamonds€101,182 EUR

8 data points across 7 retailers

6 retailers€80,705 EUR to €101,182 EUR

B+
Cheapest Retailer
-
€80,705 EUR
$90,164 USD
B+
Retailer 2
-
€84,298 EUR
$94,178 USD
View
B+
Retailer 3
-
€88,377 EUR
$98,735 USD
View
Retailer 4
-
€88,377 EUR
$98,735 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
€89,013 EUR
A$152,994 AUD
View
Most Expensive
B
77 Diamonds
RADZWBJSEWBP · Oct 30
€101,182 EUR
£89,009 GBP
View
5 more retailers have this diamond
Prices start from €80,705 EURSave up to €20,477 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.

B+
5.21ct Radiant
€80,705 EUR