Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6535966035

Certificate GIA 6535966035

Diamond specifications and retailer prices

From £2,707 GBP
$3,627 USD
As of October 28, 2026
Save £2,466 GBP (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,497 GBP 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
Colour
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: £5,497 GBP|Low: £2,707 GBP|High: £5,634 GBP|Avg: £3,557 GBP|-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£2,707 GBP
Retailer 13£2,814 GBP
Retailer 5£2,825 GBP
Retailer 17£2,840 GBP
Retailer 15£2,847 GBP
Retailer 16£3,082 GBP
Retailer 10£3,128 GBP
Retailer 7£3,155 GBP
Retailer 8£3,194 GBP
Retailer 9£3,194 GBP
Retailer 4£3,266 GBP
Retailer 2£3,491 GBP
Retailer 11£3,697 GBP
Retailer 6£3,731 GBP
Retailer 3£3,842 GBP
Retailer 12£5,173 GBP
NZ Jewellers£5,497 GBP

18 data points across 17 retailers

19 retailers£2,707 GBP to £5,173 GBP

A
Cheapest Retailer
-
£2,707 GBP
$3,627 USD
A
Retailer 2
-
£2,814 GBP
$3,770 USD
View
A
Retailer 3
-
£2,825 GBP
$3,785 USD
View
A
Retailer 4
-
£2,840 GBP
$3,805 USD
View
Final sale: no returns
A
Retailer 5
-
£2,847 GBP
$3,815 USD
View
B+
Retailer 6
-
£3,082 GBP
$4,130 USD
View
B+
Retailer 7
-
£3,128 GBP
View
Retailer 8
-
£3,155 GBP
$4,228 USD
View
Price last confirmed 12 days ago
Retailer 9
-
£3,194 GBP
$4,280 USD
View
Price last confirmed 16 days ago
Retailer 10
-
£3,194 GBP
$4,280 USD
View
Price last confirmed 17 days ago
B+
Retailer 11
-
£3,243 GBP
$4,345 USD
View
B+
Retailer 12
-
£3,266 GBP
$4,376 USD
View
B+
Retailer 13
-
£3,491 GBP
€4,455 EUR
View
Retailer 14
-
£3,533 GBP
A$7,282 AUD
View
Price last confirmed 22 days ago
B+
Retailer 15
-
£3,697 GBP
View
Retailer 16
-
£3,731 GBP
$4,999 USD
View
Price last confirmed 11 days ago
B+
Retailer 17
-
£3,842 GBP
ZAR 83,171 ZAR
View
B
Retailer 18
-
£5,173 GBP
View
Most Expensive
NZ Jewellers
0aa1fd7c-629a-41b2-8cb9-a1e3205f0648 · Oct 20
£5,497 GBP
$7,366 USD
View
Price last confirmed 12 days ago
18 more retailers have this diamond
Prices start from £2,707 GBPSave up to £2,466 GBP

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
£2,707 GBP