Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6531904444

Certificate GIA 6531904444

Diamond specifications and retailer prices

From $2,521 USD
As of November 6, 2026
Save $3,453 USD (58%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,974 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6531904444. Listed at 14 retailers as of November 5, 2026, with prices from $2,521 to $5,974, a $3,453 spread on the same certified stone. NZ Jewellers lists it at $5,974. 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
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6531904444
Dimensions7.28 × 7.24 × 4.56 mm
L/W Ratio1.01
Top View
7.28 mm7.24 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6531904444
Side View
Table 57.0%Crown 36°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.8%

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 6
Current: $5,974 USD|Low: $2,496 USD|High: $5,974 USD|Avg: $3,765 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
November 6, 2026
Retailer 12$2,521 USD
Retailer 10$2,545 USD
Retailer 13$2,766 USD
Retailer 5$3,044 USD
Retailer 14$3,100 USD
Retailer 6$3,203 USD
Retailer 8$3,274 USD
Retailer 4$3,429 USD
Retailer 2$3,511 USD
Retailer 3$3,561 USD
Retailer 7$3,957 USD
Retailer 9$3,983 USD
Retailer 15$4,606 USD
Retailer 11$5,735 USD
NZ Jewellers$5,974 USD

42 data points across 15 retailers

14 retailers$2,521 USD to $5,974 USD

A
Cheapest Retailer
-
$2,521 USD
A
Retailer 2
-
$2,545 USD
View
A
Retailer 3
-
$2,766 USD
View
A
Retailer 4
-
$3,044 USD
View
A
Retailer 5
-
$3,100 USD
View
A
Retailer 6
-
$3,203 USD
View
A
Retailer 7
-
$3,274 USD
View
Retailer 8
-
$3,429 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$3,511 USD
View
B+
Retailer 10
-
$3,561 USD
View
B+
Retailer 11
-
$3,957 USD
View
B+
Retailer 12
-
$3,983 USD
View
B
Retailer 13
-
$5,735 USD
View
Most Expensive
B
NZ Jewellers
b756b306-6707-490a-93b1-43e155f92c84 · Nov 5
$5,974 USD
View
13 more retailers have this diamond
Prices start from $2,521 USDSave up to $3,453 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 Round
$2,521 USD