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Round|Natural|GIA

1.70ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 6511976194

Certificate GIA 6511976194

Diamond specifications and retailer prices

From £2,152 GBP
As of November 4, 2026
Save £2,522 GBP (54%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,674 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 GIA 6511976194. Listed at 7 retailers as of November 4, 2026, with prices from £2,152 to £4,674, a £2,522 spread on the same certified stone. NZ Jewellers lists it at £4,674. 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 angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6511976194
Dimensions7.64 × 7.60 × 4.79 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Pinpoint, Indented Natural
Top View
7.64 mm7.60 mm1.70 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511976194
Side View
Table 56.0%Crown 35°Girdle: THN-STKPavilion 41.4°Culet: NoneDepth 62.9%

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 4
Current: £4,674 GBP|Low: £1,662 GBP|High: £4,674 GBP|Avg: £2,529 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 18, 2026
Retailer 4£1,662 GBP
Retailer 12£1,811 GBP
Retailer 3£1,835 GBP
Retailer 6£2,152 GBP
Retailer 7£2,236 GBP
Retailer 9£2,236 GBP
Retailer 2£2,274 GBP
Retailer 5£2,322 GBP
Retailer 8£2,580 GBP
Retailer 11£3,048 GBP
Retailer 10£3,185 GBP
NZ Jewellers£4,674 GBP

5 data points across 12 retailers

7 retailers£2,152 GBP to £4,674 GBP

A
Cheapest Retailer
-
£2,152 GBP
B+
Retailer 2
-
£2,236 GBP
View
Retailer 3
-
£2,236 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£2,274 GBP
View
B+
Retailer 5
-
£2,322 GBP
View
B+
Retailer 6
-
£2,580 GBP
View
Most Expensive
C
NZ Jewellers
b596512e-5dd1-4a53-9442-991dd298fa51 · Nov 5
£4,674 GBP
$6,291 USD
View
6 more retailers have this diamond
Prices start from £2,152 GBPSave up to £2,522 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
£2,152 GBP