Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6425906823

Certificate GIA 6425906823

Diamond specifications and retailer prices

From $4,800 USD
HK$37,500 HKD
As of November 1, 2026
Save $6,107 USD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $10,907 USD at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6425906823. Listed at 19 retailers as of October 30, 2026, with prices from $4,800 to $10,907, a $6,107 spread on the same certified stone. NZ Jewellers lists it at $10,907. 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
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6425906823
Dimensions7.31 × 7.27 × 4.55 mm
L/W Ratio1.01
Top View
7.31 mm7.27 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6425906823
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $10,907 USD|Low: $4,719 USD|High: $10,907 USD|Avg: $6,774 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
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 15$4,800 USD
Retailer 18$5,160 USD
Retailer 5$5,453 USD
Retailer 16$5,500 USD
Retailer 6$5,908 USD
Retailer 8$5,908 USD
Retailer 19$5,908 USD
Retailer 2$6,162 USD
Retailer 7$6,590 USD
Retailer 9$6,590 USD
Retailer 11$6,592 USD
Retailer 10$6,679 USD
Retailer 17$6,810 USD
Retailer 3$6,817 USD
Retailer 12$7,094 USD
Retailer 4$7,189 USD
Retailer 14$8,012 USD
Retailer 13$9,608 USD
NZ Jewellers$10,907 USD

43 data points across 19 retailers

19 retailers$4,800 USD to $10,907 USD

B+
Cheapest Retailer
-
$4,800 USD
HK$37,500 HKD
B+
Retailer 2
-
$5,160 USD
View
B
Retailer 3
-
$5,453 USD
View
Final sale: no returns
B
Retailer 4
-
$5,500 USD
View
B
Retailer 5
-
$5,908 USD
View
B
Retailer 6
-
$5,908 USD
View
B
Retailer 7
-
$5,908 USD
View
B+
Retailer 8
-
$6,162 USD
£4,852 GBP
View
B
Retailer 9
-
$6,590 USD
View
B
Retailer 10
-
$6,590 USD
View
Retailer 11
-
$6,592 USD
A$10,142 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
$6,679 USD
View
B
Retailer 13
-
$6,810 USD
View
B
Retailer 14
-
$6,817 USD
View
B
Retailer 15
-
$7,094 USD
€6,756 EUR
View
Retailer 16
-
$7,189 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$8,012 USD
ZAR 129,441 ZAR
View
B
Retailer 18
-
$9,608 USD
£7,565 GBP
View
Most Expensive
B
NZ Jewellers
69390dd0-34a5-44b5-99bc-6831c853a27d · Oct 30
$10,907 USD
View
18 more retailers have this diamond
Prices start from $4,800 USDSave up to $6,107 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 Round
$4,800 USD