Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 6525056251

Certificate GIA 6525056251

Diamond specifications and retailer prices

From $2,767 USD
As of November 4, 2026
Save $2,922 USD (51%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $5,943 USD at NZ Jewellers · As of October 24, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6525056251. Listed at 18 retailers as of November 4, 2026, with a 106% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6525056251
Dimensions7.57 × 5.58 × 3.88 mm
L/W Ratio1.36
Top View
7.57 mm5.58 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6525056251
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,529 USD|Low: $2,690 USD|High: $5,773 USD|Avg: $3,802 USD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 8$2,690 USD
Retailer 6$3,112 USD
Retailer 9$3,209 USD
Retailer 2$3,309 USD
Retailer 7$3,504 USD
Retailer 1$3,529 USD
Retailer 3$3,971 USD
Retailer 4$4,163 USD
Retailer 5$5,689 USD

40 data points across 9 retailers

18 retailers$2,767 USD to $5,689 USD

Retailer 1
-
$2,690 USD
Price last confirmed 17 days ago
A
Retailer 2
-
$2,767 USD
View
A
Retailer 3
-
$2,770 USD
View
A
Retailer 4
-
$2,902 USD
View
Retailer 5
-
$3,090 USD
View
Price last confirmed 12 days ago
Retailer 6
-
$3,090 USD
View
Price last confirmed 13 days ago
B+
Retailer 7
-
$3,112 USD
View
Retailer 8
-
$3,209 USD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
$3,248 USD
View
A
Retailer 10
-
$3,309 USD
View
B+
Retailer 11
-
$3,504 USD
View
B+
Retailer 12
-
$3,529 USD
View
Retailer 13
-
$3,566 USD
View
Price last confirmed 15 days ago
Retailer 14
-
$3,866 USD
View
Price last confirmed 15 days ago
B+
Retailer 15
-
$3,971 USD
View
B+
Retailer 16
-
$4,163 USD
View
B
Retailer 17
-
$5,689 USD
View
Most Expensive
NZ Jewellers
b03f8a28-4be2-450e-9357-369d22c74ae1 · Oct 24
$5,943 USD
View
Price last confirmed 13 days ago
17 more retailers have this diamond
Prices start from $2,767 USDSave up to $2,922 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
$2,767 USD