Round|Natural|IGI

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 713545321

Shape and cutting style on the report: Round brilliant

Certificate IGI 713545321

Diamond specifications and retailer prices

From £1,914 GBP
$2,565 USD
As of October 30, 2026
Save £2,553 GBP (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,468 GBP 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 IGI 713545321. Listed at 20 retailers as of October 30, 2026, with prices from £1,914 to £4,468, a £2,553 spread on the same certified stone. NZ Jewellers lists it at £4,468. 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
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 713545321
Dimensions7.30 × 7.18 × 4.59 mm
L/W Ratio1.02
Girdle conditionPARTLY FACETED
Culet sizePointed
Top View
7.30 mm7.18 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 713545321
Side View
Table 57.0%Crown 36.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.2%

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 30
Current: £4,468 GBP|Low: £1,808 GBP|High: £4,468 GBP|Avg: £2,551 GBP
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
November 1, 2026
Retailer 15£1,914 GBP
Retailer 14£1,972 GBP
Retailer 5£1,983 GBP
Retailer 3£2,093 GBP
Retailer 7£2,137 GBP
Retailer 4£2,219 GBP
Retailer 9£2,312 GBP
Retailer 13£2,344 GBP
Retailer 6£2,466 GBP
Retailer 12£2,498 GBP
Retailer 11£2,502 GBP
Retailer 2£2,552 GBP
Retailer 10£2,627 GBP
Retailer 8£3,573 GBP
NZ Jewellers£4,468 GBP

39 data points across 15 retailers

20 retailers£1,914 GBP to £4,468 GBP

A
Cheapest Retailer
-
£1,914 GBP
$2,565 USD
A
Retailer 2
-
£1,972 GBP
$2,642 USD
View
Final sale: no returns
A
Retailer 3
-
£1,983 GBP
$2,657 USD
View
Retailer 4
-
£2,037 GBP
$2,729 USD
View
Price last confirmed 83 days ago
A
Retailer 5
-
£2,093 GBP
$2,805 USD
View
Retailer 6
-
£2,137 GBP
$2,863 USD
View
Price last confirmed 36 days ago
A
Retailer 7
-
£2,137 GBP
$2,863 USD
View
A
Retailer 8
-
£2,219 GBP
$2,973 USD
View
A
Retailer 9
-
£2,243 GBP
$3,005 USD
View
A
Retailer 10
-
£2,312 GBP
View
B+
Retailer 11
-
£2,344 GBP
$3,141 USD
View
B+
Retailer 12
-
£2,466 GBP
$3,304 USD
View
Retailer 13
-
£2,466 GBP
$3,304 USD
View
Price last confirmed 40 days ago
B+
Retailer 14
-
£2,498 GBP
View
A
Retailer 15
-
£2,502 GBP
€3,193 EUR
View
A
Retailer 16
-
£2,552 GBP
View
A
Retailer 17
-
£2,627 GBP
ZAR 56,858 ZAR
View
B+
Retailer 18
-
£3,573 GBP
View
Retailer 19
-
£4,468 GBP
$5,986 USD
View
Price last confirmed 37 days ago
Most Expensive
B
NZ Jewellers
d4139d59-90a1-44fe-8074-bf5e2509c708 · Oct 30
£4,468 GBP
$5,986 USD
View
19 more retailers have this diamond
Prices start from £1,914 GBPSave up to £2,553 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
£1,914 GBP