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Round|Natural|GIA

1.70ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2488555300

Certificate GIA 2488555300

Diamond specifications and retailer prices

From £2,193 GBP
As of November 1, 2026
Save £2,660 GBP (55%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £4,853 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2488555300. Listed at 10 retailers as of November 1, 2026, with prices from £2,193 to £4,853, a £2,660 spread on the same certified stone. NZ Jewellers lists it at £4,853. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2488555300
Dimensions7.61 × 7.54 × 4.73 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.61 mm7.54 mm1.70 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2488555300
Side View
Table 58.0%Crown 36°Girdle: ThickPavilion 40.6°Culet: NoneDepth 62.5%

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: Nov 1
Current: £4,853 GBP|Low: £2,193 GBP|High: £4,853 GBP|Avg: £2,835 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 10£2,193 GBP
Retailer 9£2,240 GBP
Retailer 8£2,436 GBP
Retailer 5£2,524 GBP
Retailer 7£2,524 GBP
Retailer 4£2,621 GBP
Retailer 6£2,912 GBP
Retailer 2£3,050 GBP
Retailer 3£3,400 GBP
NZ Jewellers£4,853 GBP

26 data points across 10 retailers

10 retailers£2,193 GBP to £4,853 GBP

A
Cheapest Retailer
-
£2,193 GBP
B+
Retailer 2
-
£2,240 GBP
View
B+
Retailer 3
-
£2,436 GBP
View
Retailer 4
-
£2,524 GBP
View
Price last confirmed 9 days ago
B+
Retailer 5
-
£2,524 GBP
View
B+
Retailer 6
-
£2,621 GBP
View
B
Retailer 7
-
£2,912 GBP
View
B
Retailer 8
-
£3,050 GBP
View
B
Retailer 9
-
£3,400 GBP
View
Most Expensive
C
NZ Jewellers
615cdd80-53c7-4ec5-aaeb-bed7f5a2e6cb · Nov 5
£4,853 GBP
$6,496 USD
View
9 more retailers have this diamond
Prices start from £2,193 GBPSave up to £2,660 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
£2,193 GBP