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1.55ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 780669607

Shape and cutting style on the report: Round brilliant

Certificate IGI 780669607

Diamond specifications and retailer prices

From £1,465 GBP
SGD 2,652 SGD
As of October 31, 2026
Save £2,417 GBP (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,882 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 780669607. Listed at 7 retailers as of October 30, 2026, with prices from £1,465 to £3,882, a £2,417 spread on the same certified stone. NZ Jewellers lists it at £3,882. 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
FluorescenceNone
Crown angle34°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 780669607
Dimensions7.39 × 7.44 × 4.62 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
7.39 mm7.44 mm1.55 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 780669607
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 41.7°Culet: NoneDepth 62.2%

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 31
Current: £3,882 GBP|Low: £1,453 GBP|High: £4,215 GBP|Avg: £2,523 GBP|-7.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 4£1,465 GBP
Retailer 2£1,857 GBP
Retailer 5£2,014 GBP
Retailer 7£2,026 GBP
Retailer 3£2,026 GBP
Retailer 6£3,410 GBP
NZ Jewellers£3,882 GBP

43 data points across 7 retailers

7 retailers£1,465 GBP to £3,882 GBP

A
Cheapest Retailer
-
£1,465 GBP
SGD 2,652 SGD
A
Retailer 2
-
£1,857 GBP
$2,488 USD
View
A
Retailer 3
-
£2,014 GBP
View
A
Retailer 4
-
£2,026 GBP
$2,714 USD
View
A
Retailer 5
-
£2,026 GBP
$2,714 USD
View
A
Retailer 6
-
£3,410 GBP
View
Most Expensive
B+
NZ Jewellers
15e4c9f3-3229-43cc-95e5-9977e36fde67 · Oct 30
£3,882 GBP
$5,201 USD
View
6 more retailers have this diamond
Prices start from £1,465 GBPSave up to £2,417 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
£1,465 GBP