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Round|Natural|GIA

1.70ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1537521668

Certificate GIA 1537521668

Diamond specifications and retailer prices

From £1,627 GBP
As of November 6, 2026
Save £2,873 GBP (64%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,500 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 1537521668. Listed at 13 retailers as of November 5, 2026, with prices from £1,627 to £4,500, a £2,873 spread on the same certified stone. NZ Jewellers lists it at £4,500. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1537521668
Dimensions7.56 × 7.61 × 4.79 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
ADDITIONAL CLOUDS ARE NOT SHOWN. PINPOINTS ARE NOT SHOWN.
Top View
7.56 mm7.61 mm1.70 ctM / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1537521668
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.2%

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: £4,500 GBP|Low: £1,622 GBP|High: £4,500 GBP|Avg: £2,343 GBP|+0.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 2£1,627 GBP
Retailer 5£1,918 GBP
Retailer 10£2,030 GBP
Retailer 12£2,107 GBP
Retailer 4£2,152 GBP
Retailer 11£2,152 GBP
Retailer 13£2,235 GBP
Retailer 3£2,258 GBP
Retailer 6£2,344 GBP
Retailer 9£2,483 GBP
Retailer 8£2,504 GBP
Retailer 7£2,627 GBP
NZ Jewellers£4,500 GBP

27 data points across 13 retailers

13 retailers£1,627 GBP to £4,500 GBP

A
Cheapest Retailer
-
£1,627 GBP
A
Retailer 2
-
£1,918 GBP
View
A
Retailer 3
-
£2,030 GBP
View
A
Retailer 4
-
£2,107 GBP
View
Retailer 5
-
£2,152 GBP
View
Price last confirmed 9 days ago
A
Retailer 6
-
£2,152 GBP
View
A
Retailer 7
-
£2,235 GBP
View
A
Retailer 8
-
£2,258 GBP
View
B+
Retailer 9
-
£2,344 GBP
View
B+
Retailer 10
-
£2,483 GBP
View
B+
Retailer 11
-
£2,504 GBP
View
B+
Retailer 12
-
£2,627 GBP
View
Most Expensive
B
NZ Jewellers
ced3fa81-e339-4790-8dcb-1ec31cb76e43 · Nov 5
£4,500 GBP
$6,023 USD
View
12 more retailers have this diamond
Prices start from £1,627 GBPSave up to £2,873 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
£1,627 GBP