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Radiant|Natural|GIA

1.70ct I SI1 Radiant Natural Diamond

ID • I/SI1 • GIA 7538281786

Certificate GIA 7538281786

Diamond specifications and retailer prices

From £4,255 GBP
As of November 6, 2026
Save £4,662 GBP (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £8,917 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.7ct natural radiant diamond

This 1.7ct natural radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7538281786. Listed at 18 retailers as of November 5, 2026, with prices from £4,255 to £8,917, a £4,662 spread on the same certified stone. NZ Jewellers lists it at £8,917. 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7538281786
Dimensions7.76 × 5.96 × 4.15 mm
L/W Ratio1.30
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.76 mm5.96 mm1.70 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7538281786
Side View
Table 70.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.6%

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: £8,917 GBP|Low: £4,255 GBP|High: £9,001 GBP|Avg: £5,467 GBP|-0.9%
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
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 8£4,255 GBP
Retailer 5£4,459 GBP
Retailer 6£4,501 GBP
Retailer 2£4,610 GBP
Retailer 16£4,647 GBP
Retailer 4£4,756 GBP
Retailer 14£4,830 GBP
Retailer 15£4,830 GBP
Retailer 10£5,031 GBP
Retailer 9£5,062 GBP
Retailer 7£5,223 GBP
Retailer 3£5,573 GBP
Retailer 11£5,792 GBP
Retailer 12£6,505 GBP
Retailer 13£7,833 GBP
NZ Jewellers£8,917 GBP

28 data points across 16 retailers

18 retailers£4,255 GBP to £8,917 GBP

A
Cheapest Retailer
-
£4,255 GBP
A
Retailer 2
-
£4,459 GBP
View
Final sale: no returns
Retailer 3
-
£4,501 GBP
View
Price last confirmed 9 days ago
A
Retailer 4
-
£4,610 GBP
View
A
Retailer 5
-
£4,647 GBP
View
B+
Retailer 6
-
£4,756 GBP
View
B+
Retailer 7
-
£4,830 GBP
View
B+
Retailer 8
-
£4,830 GBP
View
B+
Retailer 9
-
£5,031 GBP
View
B+
Retailer 10
-
£5,062 GBP
View
Retailer 11
-
£5,223 GBP
View
Price last confirmed 16 days ago
B+
Retailer 12
-
£5,476 GBP
View
B+
Retailer 13
-
£5,573 GBP
View
B+
Retailer 14
-
£5,792 GBP
View
Retailer 15
-
£5,931 GBP
View
Price last confirmed 15 days ago
B+
Retailer 16
-
£6,505 GBP
View
B
Retailer 17
-
£7,833 GBP
View
Most Expensive
B
NZ Jewellers
563d825d-6565-4a33-aed0-1c3b04c00733 · Nov 5
£8,917 GBP
$11,935 USD
View
17 more retailers have this diamond
Prices start from £4,255 GBPSave up to £4,662 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 Radiant
£4,255 GBP