Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

VG • K/SI2 • GIA 6505379824

Certificate GIA 6505379824

Diamond specifications and retailer prices

From $4,343 USD
As of November 6, 2026
Save $5,038 USD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $9,381 USD at NZ Jewellers · As of November 5, 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 SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6505379824. Listed at 16 retailers as of November 5, 2026, with prices from $4,343 to $9,381, a $5,038 spread on the same certified stone. NZ Jewellers lists it at $9,381. 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
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle56.7°
OriginNatural
Grading LabGIA
CertificateGIA 6505379824
Dimensions8.21 × 5.73 × 3.89 mm
L/W Ratio1.43
Top View
8.21 mm5.73 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505379824
Side View
Table 70.0%Crown 46°Girdle: ThickPavilion 56.7°Culet: NoneDepth 67.9%

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: Nov 6
Current: $9,381 USD|Low: $4,343 USD|High: $9,381 USD|Avg: $5,839 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 16$4,343 USD
Retailer 3$4,432 USD
Retailer 8$4,455 USD
Retailer 14$4,486 USD
Retailer 4$4,730 USD
Retailer 5$5,082 USD
Retailer 6$5,082 USD
Retailer 7$5,082 USD
Retailer 2$5,418 USD
Retailer 10$5,446 USD
Retailer 9$5,589 USD
Retailer 15$5,863 USD
Retailer 11$6,312 USD
Retailer 13$8,123 USD
Retailer 12$8,910 USD
NZ Jewellers$9,381 USD

36 data points across 16 retailers

16 retailers$4,343 USD to $9,381 USD

B+
Cheapest Retailer
-
$4,343 USD
B+
Retailer 2
-
$4,432 USD
View
Retailer 3
-
$4,455 USD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$4,486 USD
View
B
Retailer 5
-
$4,730 USD
View
Retailer 6
-
$5,082 USD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$5,082 USD
View
B
Retailer 8
-
$5,082 USD
View
B
Retailer 9
-
$5,418 USD
View
B
Retailer 10
-
$5,446 USD
View
B
Retailer 11
-
$5,589 USD
View
B
Retailer 12
-
$5,863 USD
View
B
Retailer 13
-
$6,312 USD
View
C
Retailer 14
-
$8,123 USD
View
C
Retailer 15
-
$8,910 USD
View
Most Expensive
C
NZ Jewellers
17d9eeda-530a-4a6b-a860-8d667072c6b2 · Nov 5
$9,381 USD
View
15 more retailers have this diamond
Prices start from $4,343 USDSave up to $5,038 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.

B+
1.51ct Radiant
$4,343 USD