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Radiant|Natural|GIA

1.51ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 6551450041

Certificate GIA 6551450041

Diamond specifications and retailer prices

From $4,558 USD
As of November 2, 2026
Save $3,871 USD (46%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $8,429 USD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551450041. Listed at 5 retailers as of November 2, 2026, with prices from $4,558 to $8,429, a $3,871 spread on the same certified stone. NZ Jewellers lists it at $8,429. 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
F
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle49.99°
Pavilion angle37.17°
OriginNatural
Grading LabGIA
CertificateGIA 6551450041
Dimensions7.69 × 5.69 × 3.95 mm
L/W Ratio1.35
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle
Top View
7.69 mm5.69 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551450041
Side View
Table 72.0%Crown 49.99°GirdlePavilion 37.17°Culet: NoneDepth 69.5%

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 2
Current: $8,429 USD|Low: $4,518 USD|High: $8,715 USD|Avg: $5,918 USD|-3.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 6$4,518 USD
Retailer 3$4,558 USD
Retailer 2$4,806 USD
Retailer 5$4,838 USD
Retailer 4$7,705 USD
NZ Jewellers$8,429 USD

30 data points across 6 retailers

5 retailers$4,558 USD to $8,429 USD

A
Cheapest Retailer
-
$4,558 USD
A
Retailer 2
-
$4,806 USD
View
A
Retailer 3
-
$4,838 USD
View
B+
Retailer 4
-
$7,705 USD
View
Most Expensive
B
NZ Jewellers
80870a86-fca2-418a-b14a-2f2733de10a6 · Nov 3
$8,429 USD
View
4 more retailers have this diamond
Prices start from $4,558 USDSave up to $3,871 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
1.51ct Radiant
$4,558 USD