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Round|Natural|GIA

1.70ct N SI1 Round Natural Diamond

EX • N/SI1 • GIA 3355486809

Certificate GIA 3355486809

Diamond specifications and retailer prices

From £1,839 GBP
As of November 5, 2026
Save £2,037 GBP (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,876 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 N colour (tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3355486809. Listed at 9 retailers as of November 5, 2026, with prices from £1,839 to £3,876, a £2,037 spread on the same certified stone. NZ Jewellers lists it at £3,876. 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
N
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3355486809
Dimensions7.57 × 7.62 × 4.78 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.57 mm7.62 mm1.70 ctN / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3355486809
Side View
Table 55.0%Crown 36°Girdle: MED-STKPavilion 40.8°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 5
Current: £3,876 GBP|Low: £1,612 GBP|High: £9,560 GBP|Avg: £3,404 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
November 5, 2026
Retailer 4£1,612 GBP
Retailer 6£1,839 GBP
Retailer 8£1,854 GBP
Retailer 10£1,854 GBP
Retailer 7£1,940 GBP
Retailer 11£1,958 GBP
Retailer 9£2,139 GBP
Retailer 5£2,262 GBP
Retailer 2£2,297 GBP
NZ Jewellers£3,876 GBP
Retailer 12£9,285 GBP
Retailer 3£9,560 GBP

23 data points across 12 retailers

9 retailers£1,839 GBP to £3,876 GBP

A
Cheapest Retailer
-
£1,839 GBP
Retailer 2
-
£1,854 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£1,854 GBP
View
A
Retailer 4
-
£1,940 GBP
View
A
Retailer 5
-
£1,958 GBP
View
B+
Retailer 6
-
£2,139 GBP
View
B+
Retailer 7
-
£2,262 GBP
View
B+
Retailer 8
-
£2,297 GBP
View
Most Expensive
B
NZ Jewellers
58dcfb40-8d1a-4ea1-9952-0c5823fadc06 · Nov 5
£3,876 GBP
$5,217 USD
View
8 more retailers have this diamond
Prices start from £1,839 GBPSave up to £2,037 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
£1,839 GBP