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Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 6552381241

Certificate GIA 6552381241

Diamond specifications and retailer prices

From €4,125 EUR
As of November 5, 2026
Save €22 EUR (1%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €4,147 EUR at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552381241. Listed at 4 retailers as of November 5, 2026, with a relatively tight 1% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552381241
Dimensions7.57 × 5.72 × 3.88 mm
L/W Ratio1.32
Culet sizeNone
Top View
7.57 mm5.72 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552381241
Side View
Table 67.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 67.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: €4,147 EUR|Low: €2,429 EUR|High: €4,532 EUR|Avg: €3,299 EUR|+49.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11€2,429 EUR
Retailer 5€2,486 EUR
Retailer 3€2,627 EUR
Retailer 9€2,926 EUR
Retailer 7€3,206 EUR
Retailer 6€3,229 EUR
Retailer 4€3,371 EUR
Retailer 8€4,016 EUR
Retailer 2€4,125 EUR
77 Diamonds€4,147 EUR
Retailer 10€4,445 EUR

35 data points across 11 retailers

4 retailers€4,125 EUR to €4,147 EUR

Retailer 1
-
€2,429 EUR
Price last confirmed 31 days ago
Retailer 2
-
€2,926 EUR
View
Price last confirmed 31 days ago
B
Retailer 3
-
€4,125 EUR
View
Most Expensive
B+
77 Diamonds
RADJECFZJDJQ · Nov 7
€4,147 EUR
£3,646 GBP
View
3 more retailers have this diamond
Prices start from €4,125 EURSave up to €22 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+
1.51ct Radiant
€4,125 EUR