Round|Natural|IGI

1.55ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 536201745

Shape and cutting style on the report: Round brilliant

Certificate IGI 536201745

Diamond specifications and retailer prices

From £3,737 GBP
As of November 6, 2026
Save £3,343 GBP (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £7,080 GBP at Allurez · As of November 5, 2026
View at Allurez

About this 1.55ct natural round diamond

This 1.55ct 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 536201745. Listed at 15 retailers as of November 5, 2026, with prices from £3,737 to £7,080, a £3,343 spread on the same certified stone. Allurez lists it at £7,080. 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

1.55
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 536201745
Dimensions7.41 × 7.37 × 4.62 mm
L/W Ratio1.01
Culet sizePointed
Top View
7.41 mm7.37 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 536201745
Side View
Table 57.5%Crown 34.5°Girdle: MediumPavilion 41.4°Culet: NoneDepth 62.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £7,080 GBP|Low: £2,050 GBP|High: £7,080 GBP|Avg: £2,772 GBP
Allurez
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
November 3, 2026
Retailer 12£2,192 GBP
Retailer 7£2,223 GBP
Retailer 14£2,236 GBP
Retailer 8£2,348 GBP
Retailer 4£2,424 GBP
Retailer 6£2,424 GBP
Retailer 16£2,517 GBP
Retailer 2£2,518 GBP
Retailer 3£2,796 GBP
Retailer 11£2,807 GBP
Retailer 10£2,819 GBP
Retailer 9£2,924 GBP
Retailer 15£2,929 GBP
Retailer 13£4,074 GBP
Retailer 5£4,222 GBP
Allurez£7,080 GBP

30 data points across 16 retailers

15 retailers£3,737 GBP to £7,080 GBP

Retailer 1
-
£2,192 GBP
Price last confirmed 19 days ago
Retailer 2
-
£2,223 GBP
View
Price last confirmed 14 days ago
Retailer 3
-
£2,348 GBP
View
Price last confirmed 14 days ago
Retailer 4
-
£2,424 GBP
View
Price last confirmed 21 days ago
Retailer 5
-
£2,424 GBP
View
Price last confirmed 15 days ago
Retailer 6
-
£2,517 GBP
View
Price last confirmed 15 days ago
Retailer 7
-
£2,518 GBP
View
Price last confirmed 14 days ago
Retailer 8
-
£2,530 GBP
View
Price last confirmed 19 days ago
Retailer 9
-
£2,796 GBP
View
Price last confirmed 14 days ago
Retailer 10
-
£2,807 GBP
View
Price last confirmed 14 days ago
Retailer 11
-
£2,924 GBP
View
Price last confirmed 15 days ago
B
Retailer 12
-
£3,737 GBP
View
Retailer 13
-
£4,074 GBP
View
Price last confirmed 16 days ago
Retailer 14
-
£4,222 GBP
View
Price last confirmed 17 days ago
Most Expensive
C
Allurez
5853908 · Nov 5
£7,080 GBP
$9,529 USD
View
14 more retailers have this diamond
Prices start from £3,737 GBPSave up to £3,343 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
1.55ct Round
£3,737 GBP