CaratHunter
Plans
Radiant|Natural|GIA

1.70ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 5553653122

Certificate GIA 5553653122

Diamond specifications and retailer prices

From £3,873 GBP
As of November 6, 2026
Save £3,703 GBP (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £8,667 GBP at NZ Jewellers · As of October 18, 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 5553653122. Listed at 18 retailers as of November 4, 2026, with a 96% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553653122
Dimensions7.91 × 6.08 × 4.19 mm
L/W Ratio1.30
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
7.91 mm6.08 mm1.70 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5553653122
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.9%

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 6
Current: £4,763 GBP|Low: £3,854 GBP|High: £7,726 GBP|Avg: £5,225 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 9£3,873 GBP
Retailer 4£4,066 GBP
Retailer 7£4,622 GBP
Retailer 2£4,759 GBP
Retailer 1£4,763 GBP
Retailer 3£4,897 GBP
Retailer 10£5,275 GBP
Retailer 5£5,602 GBP
Retailer 6£6,291 GBP
Retailer 8£7,576 GBP

31 data points across 10 retailers

18 retailers£3,873 GBP to £7,576 GBP

A
Cheapest Retailer
-
£3,873 GBP
A
Retailer 2
-
£4,066 GBP
View
A
Retailer 3
-
£4,622 GBP
View
B+
Retailer 4
-
£4,759 GBP
View
Final sale: no returns
B+
Retailer 5
-
£4,763 GBP
View
B+
Retailer 6
-
£4,779 GBP
View
Retailer 7
-
£4,784 GBP
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£4,897 GBP
View
Retailer 9
-
£5,133 GBP
View
Price last confirmed 34 days ago
B+
Retailer 10
-
£5,161 GBP
View
Retailer 11
-
£5,182 GBP
View
Price last confirmed 20 days ago
Retailer 12
-
£5,262 GBP
View
Price last confirmed 22 days ago
B+
Retailer 13
-
£5,275 GBP
View
B+
Retailer 14
-
£5,602 GBP
View
Retailer 15
-
£5,979 GBP
View
Price last confirmed 19 days ago
B
Retailer 16
-
£6,291 GBP
View
B
Retailer 17
-
£7,576 GBP
View
Most Expensive
NZ Jewellers
b99a8c8d-00a3-444e-93bb-a632b137d102 · Oct 18
£8,667 GBP
$11,601 USD
View
Price last confirmed 20 days ago
17 more retailers have this diamond
Prices start from £3,873 GBPSave up to £3,703 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
£3,873 GBP