Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6501583878

Certificate GIA 6501583878

Diamond specifications and retailer prices

From $5,835 USD
As of October 25, 2026
Save $6,605 USD (53%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $12,440 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 6501583878. Listed at 18 retailers as of October 25, 2026, with prices from $5,835 to $12,440, a $6,605 spread on the same certified stone. NZ Jewellers lists it at $12,440. 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 angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6501583878
Dimensions7.35 × 7.30 × 4.60 mm
L/W Ratio1.01
Top View
7.35 mm7.30 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6501583878
Side View
Table 57.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.8%

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: Oct 25
Current: $8,911 USD|Low: $5,835 USD|High: $10,490 USD|Avg: $7,561 USD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 9$5,835 USD
Retailer 11$5,877 USD
Retailer 10$6,250 USD
Retailer 2$6,842 USD
Retailer 4$6,965 USD
Retailer 3$7,132 USD
Retailer 8$7,219 USD
Retailer 5$8,128 USD
Retailer 1$8,911 USD
Retailer 7$9,057 USD
Retailer 6$10,422 USD

35 data points across 11 retailers

18 retailers$5,835 USD to $12,440 USD

B+
Cheapest Retailer
-
$5,835 USD
B+
Retailer 2
-
$5,877 USD
View
B
Retailer 3
-
$6,220 USD
View
B
Retailer 4
-
$6,250 USD
View
B
Retailer 5
-
$6,630 USD
View
B
Retailer 6
-
$6,738 USD
View
B
Retailer 7
-
$6,842 USD
View
B
Retailer 8
-
$6,965 USD
£5,484 GBP
View
B
Retailer 9
-
$7,132 USD
View
Retailer 10
-
$7,219 USD
A$11,106 AUD
View
Price last confirmed 9 days ago
Retailer 11
-
$7,775 USD
View
Price last confirmed 54 days ago
B
Retailer 12
-
$7,775 USD
View
B
Retailer 13
-
$8,128 USD
€7,741 EUR
View
Retailer 14
-
$8,196 USD
View
Price last confirmed 8 days ago
B
Retailer 15
-
$8,911 USD
£7,016 GBP
View
B
Retailer 16
-
$9,057 USD
ZAR 146,321 ZAR
View
B
Retailer 17
-
$10,422 USD
£8,206 GBP
View
Most Expensive
B
NZ Jewellers
f4d4f422-75b9-49b3-bb55-82b45c3d718f · Oct 30
$12,440 USD
View
17 more retailers have this diamond
Prices start from $5,835 USDSave up to $6,605 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
$5,835 USD