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1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6425906823

Certificate GIA 6425906823

Diamond specifications and retailer prices

From €4,280 EUR
HK$37,500 HKD
As of November 1, 2026
Save €5,445 EUR (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €9,724 EUR at NZ Jewellers · As of November 2, 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 November 1, 2026, with prices from €4,280 to €9,724, a €5,445 spread on the same certified stone. NZ Jewellers lists it at €9,724. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €9,724 EUR|Low: €4,207 EUR|High: €9,724 EUR|Avg: €6,047 EUR
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€4,280 EUR
Retailer 18€4,601 EUR
Retailer 5€4,862 EUR
Retailer 16€4,904 EUR
Retailer 6€5,267 EUR
Retailer 8€5,267 EUR
Retailer 19€5,267 EUR
Retailer 2€5,494 EUR
Retailer 7€5,876 EUR
Retailer 9€5,876 EUR
Retailer 11€5,877 EUR
Retailer 10€5,955 EUR
Retailer 17€6,072 EUR
Retailer 3€6,078 EUR
Retailer 12€6,325 EUR
Retailer 4€6,410 EUR
Retailer 14€7,144 EUR
Retailer 13€8,566 EUR
NZ Jewellers€9,724 EUR

42 data points across 19 retailers

19 retailers€4,280 EUR to €9,724 EUR

B+
Cheapest Retailer
-
€4,280 EUR
HK$37,500 HKD
B+
Retailer 2
-
€4,601 EUR
$5,160 USD
View
B
Retailer 3
-
€4,862 EUR
$5,453 USD
View
Final sale: no returns
B
Retailer 4
-
€4,904 EUR
$5,500 USD
View
B
Retailer 5
-
€5,267 EUR
$5,908 USD
View
B
Retailer 6
-
€5,267 EUR
$5,908 USD
View
B
Retailer 7
-
€5,267 EUR
$5,908 USD
View
B+
Retailer 8
-
€5,494 EUR
£4,852 GBP
View
B
Retailer 9
-
€5,876 EUR
$6,590 USD
View
B
Retailer 10
-
€5,876 EUR
$6,590 USD
View
Retailer 11
-
€5,877 EUR
A$10,142 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
€5,955 EUR
$6,679 USD
View
B
Retailer 13
-
€6,072 EUR
$6,810 USD
View
B
Retailer 14
-
€6,078 EUR
$6,817 USD
View
B
Retailer 15
-
€6,325 EUR
View
Retailer 16
-
€6,410 EUR
$7,189 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
€7,144 EUR
ZAR 129,441 ZAR
View
B
Retailer 18
-
€8,566 EUR
£7,565 GBP
View
Most Expensive
B
NZ Jewellers
69390dd0-34a5-44b5-99bc-6831c853a27d · Nov 2
€9,724 EUR
$10,907 USD
View
18 more retailers have this diamond
Prices start from €4,280 EURSave up to €5,445 EUR

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
€4,280 EUR