Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1533036143

Certificate GIA 1533036143

Diamond specifications and retailer prices

From £3,220 GBP
$4,314 USD
As of October 30, 2026
Save £3,305 GBP (51%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £6,815 GBP at NZ Jewellers · As of September 26, 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 1533036143. Listed at 28 retailers as of October 29, 2026, with a 103% 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 angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1533036143
Dimensions7.32 × 7.37 × 4.56 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Knot, Feather, Natural
Top View
7.32 mm7.37 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1533036143
Side View
Table 59.0%Crown 33.5°Girdle: THN-STKPavilion 41.8°Culet: NoneDepth 62.0%

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 30
Current: £3,950 GBP|Low: £3,220 GBP|High: £6,569 GBP|Avg: £4,377 GBP|+1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 12£3,220 GBP
Retailer 13£3,408 GBP
Retailer 10£3,474 GBP
Retailer 11£3,692 GBP
Retailer 3£3,908 GBP
Retailer 1£3,950 GBP
Retailer 4£4,130 GBP
Retailer 2£4,464 GBP
Retailer 5£4,497 GBP
Retailer 7£4,612 GBP
Retailer 8£4,882 GBP
Retailer 6£5,009 GBP
Retailer 9£6,525 GBP

30 data points across 13 retailers

28 retailers£3,220 GBP to £6,525 GBP

B+
Cheapest Retailer
-
£3,220 GBP
$4,314 USD
B+
Retailer 2
-
£3,408 GBP
$4,566 USD
View
Final sale: no returns
B+
Retailer 3
-
£3,474 GBP
$4,655 USD
View
B+
Retailer 4
-
£3,659 GBP
$4,902 USD
View
Retailer 5
-
£3,692 GBP
$4,947 USD
View
Price last confirmed 45 days ago
B+
Retailer 6
-
£3,692 GBP
$4,947 USD
View
Retailer 7
-
£3,692 GBP
$4,947 USD
View
Price last confirmed 31 days ago
Retailer 8
-
£3,692 GBP
$4,947 USD
View
Price last confirmed 33 days ago
B
Retailer 9
-
£3,908 GBP
$5,236 USD
View
Retailer 10
-
£3,908 GBP
$5,236 USD
View
Price last confirmed 27 days ago
B+
Retailer 11
-
£3,950 GBP
View
B
Retailer 12
-
£3,978 GBP
$5,330 USD
View
B
Retailer 13
-
£3,978 GBP
$5,330 USD
View
B
Retailer 14
-
£4,112 GBP
$5,510 USD
View
Retailer 15
-
£4,130 GBP
A$8,513 AUD
View
Price last confirmed 28 days ago
B+
Retailer 16
-
£4,184 GBP
$5,606 USD
View
Retailer 17
-
£4,260 GBP
$5,708 USD
View
Price last confirmed 40 days ago
Retailer 18
-
£4,260 GBP
$5,708 USD
View
Price last confirmed 11 days ago
Retailer 19
-
£4,260 GBP
$5,708 USD
View
Price last confirmed 33 days ago
B
Retailer 20
-
£4,260 GBP
$5,708 USD
View
B
Retailer 21
-
£4,464 GBP
View
Retailer 22
-
£4,497 GBP
$6,025 USD
View
Price last confirmed 27 days ago
B
Retailer 23
-
£4,612 GBP
€5,885 EUR
View
B
Retailer 24
-
£4,882 GBP
View
B
Retailer 25
-
£5,009 GBP
ZAR 108,428 ZAR
View
B
Retailer 26
-
£6,525 GBP
View
Retailer 27
-
£6,815 GBP
$9,132 USD
View
Price last confirmed 42 days ago
Most Expensive
NZ Jewellers
85863596-3e43-482f-b9f2-4c5df5b95ce2 · Sep 26
£6,815 GBP
$9,132 USD
View
Price last confirmed 35 days ago
27 more retailers have this diamond
Prices start from £3,220 GBPSave up to £3,305 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.

B+
1.51ct Round
£3,220 GBP