Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6535966035

Certificate GIA 6535966035

Diamond specifications and retailer prices

From $3,627 USD
As of October 28, 2026
Save $3,305 USD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $7,366 USD at NZ Jewellers · As of October 20, 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 6535966035. Listed at 19 retailers as of October 28, 2026, with a 91% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6535966035
Dimensions7.34 × 7.30 × 4.54 mm
L/W Ratio1.01
Top View
7.34 mm7.30 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6535966035
Side View
Table 59.0%Crown 35.5°Girdle: MED-SLIPavilion 41°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $7,366 USD|Low: $3,627 USD|High: $7,549 USD|Avg: $4,766 USD|-2.4%
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
October 29, 2026
Retailer 14$3,627 USD
Retailer 13$3,770 USD
Retailer 5$3,785 USD
Retailer 17$3,805 USD
Retailer 15$3,815 USD
Retailer 16$4,130 USD
Retailer 10$4,191 USD
Retailer 7$4,228 USD
Retailer 8$4,280 USD
Retailer 9$4,280 USD
Retailer 4$4,376 USD
Retailer 2$4,678 USD
Retailer 11$4,953 USD
Retailer 6$4,999 USD
Retailer 3$5,148 USD
Retailer 12$6,932 USD
NZ Jewellers$7,366 USD

18 data points across 17 retailers

19 retailers$3,627 USD to $6,932 USD

A
Cheapest Retailer
-
$3,627 USD
A
Retailer 2
-
$3,770 USD
View
A
Retailer 3
-
$3,785 USD
View
A
Retailer 4
-
$3,805 USD
View
Final sale: no returns
A
Retailer 5
-
$3,815 USD
View
B+
Retailer 6
-
$4,130 USD
View
B+
Retailer 7
-
$4,191 USD
£3,300 GBP
View
Retailer 8
-
$4,228 USD
View
Price last confirmed 11 days ago
Retailer 9
-
$4,280 USD
View
Price last confirmed 15 days ago
Retailer 10
-
$4,280 USD
View
Price last confirmed 15 days ago
B+
Retailer 11
-
$4,345 USD
View
B+
Retailer 12
-
$4,376 USD
View
B+
Retailer 13
-
$4,678 USD
€4,455 EUR
View
Retailer 14
-
$4,733 USD
A$7,282 AUD
View
Price last confirmed 21 days ago
B+
Retailer 15
-
$4,953 USD
£3,900 GBP
View
Retailer 16
-
$4,999 USD
View
Price last confirmed 10 days ago
B+
Retailer 17
-
$5,148 USD
ZAR 83,171 ZAR
View
B
Retailer 18
-
$6,932 USD
£5,458 GBP
View
Most Expensive
NZ Jewellers
0aa1fd7c-629a-41b2-8cb9-a1e3205f0648 · Oct 20
$7,366 USD
View
Price last confirmed 10 days ago
18 more retailers have this diamond
Prices start from $3,627 USDSave up to $3,305 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
$3,627 USD