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Round|Natural|GIA

1.70ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6445964287

Certificate GIA 6445964287

Diamond specifications and retailer prices

From £2,084 GBP
As of November 6, 2026
Save £2,800 GBP (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,885 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 6445964287. Listed at 11 retailers as of November 5, 2026, with prices from £2,084 to £4,885, a £2,800 spread on the same certified stone. NZ Jewellers lists it at £4,885. 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
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6445964287
Dimensions7.69 × 7.76 × 4.62 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.69 mm7.76 mm1.70 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6445964287
Side View
Table 61.0%Crown 32.5°Girdle: MED-NULPavilion 41°Culet: NoneDepth 59.8%

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 6
Current: £4,885 GBP|Low: £2,065 GBP|High: £4,954 GBP|Avg: £3,019 GBP|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 6£2,084 GBP
Retailer 3£2,495 GBP
Retailer 4£2,557 GBP
Retailer 8£2,686 GBP
Retailer 7£2,804 GBP
Retailer 10£2,804 GBP
Retailer 12£2,911 GBP
Retailer 9£2,913 GBP
Retailer 11£3,235 GBP
Retailer 2£3,257 GBP
Retailer 5£3,423 GBP
NZ Jewellers£4,885 GBP

34 data points across 12 retailers

11 retailers£2,084 GBP to £4,885 GBP

A
Cheapest Retailer
-
£2,084 GBP
B+
Retailer 2
-
£2,495 GBP
View
B+
Retailer 3
-
£2,686 GBP
View
B+
Retailer 4
-
£2,804 GBP
View
Retailer 5
-
£2,804 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£2,911 GBP
View
B+
Retailer 7
-
£2,913 GBP
View
B
Retailer 8
-
£3,235 GBP
View
B
Retailer 9
-
£3,257 GBP
View
B
Retailer 10
-
£3,423 GBP
View
Most Expensive
B
NZ Jewellers
91f6c9c7-1955-4b6e-bdc0-fe6fb80ad956 · Nov 5
£4,885 GBP
$6,538 USD
View
10 more retailers have this diamond
Prices start from £2,084 GBPSave up to £2,800 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
£2,084 GBP