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Round|Natural|IGI

1.55ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 668457801

Shape and cutting style on the report: Round brilliant

Certificate IGI 668457801

Diamond specifications and retailer prices

From £2,529 GBP
$3,388 USD
As of October 30, 2026
Save £2,435 GBP (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,963 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 668457801. Listed at 13 retailers as of October 30, 2026, with prices from £2,529 to £4,963, a £2,435 spread on the same certified stone. NZ Jewellers lists it at £4,963. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 668457801
Dimensions7.45 × 7.52 × 4.49 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.45 mm7.52 mm1.55 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 668457801
Side View
Table 58.0%Crown 33.4°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 59.9%

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: £4,963 GBP|Low: £2,410 GBP|High: £4,963 GBP|Avg: £3,207 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
October 30, 2026
Retailer 11£2,467 GBP
Retailer 13£2,529 GBP
Retailer 5£2,546 GBP
Retailer 12£2,629 GBP
Retailer 4£2,849 GBP
Retailer 15£2,849 GBP
Retailer 7£2,958 GBP
Retailer 14£2,958 GBP
Retailer 2£3,091 GBP
Retailer 10£3,284 GBP
Retailer 3£3,287 GBP
Retailer 8£3,344 GBP
Retailer 6£3,390 GBP
Retailer 9£4,789 GBP
NZ Jewellers£4,963 GBP

39 data points across 15 retailers

13 retailers£2,529 GBP to £4,963 GBP

Retailer 1
-
£2,467 GBP
$3,305 USD
Price last confirmed 13 days ago
A
Retailer 2
-
£2,529 GBP
$3,388 USD
View
A
Retailer 3
-
£2,629 GBP
$3,523 USD
View
Final sale: no returns
A
Retailer 4
-
£2,849 GBP
$3,817 USD
View
A
Retailer 5
-
£2,849 GBP
$3,817 USD
View
A
Retailer 6
-
£2,958 GBP
$3,963 USD
View
A
Retailer 7
-
£2,958 GBP
$3,964 USD
View
A
Retailer 8
-
£3,091 GBP
View
A
Retailer 9
-
£3,284 GBP
View
B+
Retailer 10
-
£3,287 GBP
$4,404 USD
View
A
Retailer 11
-
£3,344 GBP
€4,267 EUR
View
B+
Retailer 12
-
£4,789 GBP
View
Most Expensive
B
NZ Jewellers
e9cd51c0-6bd9-4603-b3f2-4a85b77b4a21 · Oct 30
£4,963 GBP
$6,650 USD
View
12 more retailers have this diamond
Prices start from £2,529 GBPSave up to £2,435 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
1.55ct Round
£2,529 GBP