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Round|Natural|IGI

1.70ct M SI2 Round Natural Diamond

EX • M/SI2 • IGI 539240166

Shape and cutting style on the report: Round brilliant

Certificate IGI 539240166

Diamond specifications and retailer prices

From £577 GBP
As of November 5, 2026
Save £1,501 GBP (72%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,078 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.7ct natural round diamond

This 1.7ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 539240166. Listed at 8 retailers as of November 5, 2026, with prices from £577 to £2,078, a £1,501 spread on the same certified stone. NZ Jewellers lists it at £2,078. 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

1.70
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 539240166
Dimensions7.51 × 7.56 × 4.77 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.51 mm7.56 mm1.70 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 539240166
Side View
Table 58.0%Crown 36.3°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,078 GBP|Low: £577 GBP|High: £2,078 GBP|Avg: £1,009 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 2£577 GBP
Retailer 4£816 GBP
Retailer 7£852 GBP
Retailer 9£852 GBP
Retailer 6£885 GBP
Retailer 10£912 GBP
Retailer 11£951 GBP
Retailer 8£983 GBP
Retailer 3£1,013 GBP
Retailer 5£1,144 GBP
NZ Jewellers£2,078 GBP

44 data points across 11 retailers

8 retailers£577 GBP to £2,078 GBP

A
Cheapest Retailer
-
£577 GBP
B+
Retailer 2
-
£816 GBP
View
Retailer 3
-
£852 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£852 GBP
View
B+
Retailer 5
-
£885 GBP
View
B+
Retailer 6
-
£951 GBP
View
B+
Retailer 7
-
£983 GBP
View
Most Expensive
B+
NZ Jewellers
651c7010-a8af-4a21-9def-7a2a13bc1f54 · Nov 5
£2,078 GBP
$2,797 USD
View
7 more retailers have this diamond
Prices start from £577 GBPSave up to £1,501 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
1.70ct Round
£577 GBP