Round|Natural|IGI

1.59ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 670479564

Shape and cutting style on the report: Round brilliant

Certificate IGI 670479564

Diamond specifications and retailer prices

From £2,719 GBP
$3,643 USD
As of October 31, 2026
13 retailers carry this diamond
Most expensive: £5,337 GBP at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.59ct natural round diamond

This 1.59ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670479564. Listed at 13 retailers as of October 31, 2026. 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

1.59
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 670479564
Dimensions7.41 × 7.36 × 4.68 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.41 mm7.36 mm1.59 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670479564
Side View
Table 56.0%Crown 36°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 63.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £2,719 GBP|Low: £2,685 GBP|High: £5,345 GBP|Avg: £3,367 GBP|+1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 6£2,695 GBP
Retailer 1£2,719 GBP
Retailer 2£2,780 GBP
Retailer 5£3,063 GBP
Retailer 9£3,063 GBP
Retailer 7£3,237 GBP
Retailer 3£3,445 GBP
Retailer 4£3,697 GBP
Retailer 8£5,310 GBP

28 data points across 9 retailers

13 retailers

Retailer 1
-
£2,695 GBP
$3,611 USD
Price last confirmed 10 days ago
A
Retailer 2
-
£2,719 GBP
$3,643 USD
View
Retailer 3
-
£2,780 GBP
$3,725 USD
View
Price last confirmed 8 days ago
Retailer 4
-
£2,913 GBP
$3,904 USD
View
Price last confirmed 97 days ago
Retailer 5
-
£3,063 GBP
$4,104 USD
View
Price last confirmed 39 days ago
Retailer 6
-
£3,063 GBP
$4,104 USD
View
Price last confirmed 10 days ago
Retailer 7
-
£3,158 GBP
$4,232 USD
View
Price last confirmed 16 days ago
Retailer 8
-
£3,237 GBP
View
Price last confirmed 10 days ago
Retailer 9
-
£3,445 GBP
€4,396 EUR
View
Price last confirmed 10 days ago
Retailer 10
-
£3,535 GBP
$4,736 USD
View
Price last confirmed 40 days ago
Retailer 11
-
£3,697 GBP
ZAR 80,024 ZAR
View
Price last confirmed 10 days ago
Retailer 12
-
£5,310 GBP
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
89e6f9b9-153f-4200-b5bb-c9a25bead4fb · Sep 19
£5,337 GBP
$7,151 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from £2,719 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
1.59ct Round
£2,719 GBP