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Round|Natural|GIA

1.70ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2556520738

Certificate GIA 2556520738

Diamond specifications and retailer prices

From £4,176 GBP
$5,596 USD
As of October 31, 2026
Save £3,952 GBP (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £9,375 GBP at NZ Jewellers · As of September 28, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556520738. Listed at 18 retailers as of October 26, 2026, with a 95% 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle32.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556520738
Dimensions7.71 × 7.75 × 4.69 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Pinpoint, Natural
Top View
7.71 mm7.75 mm1.70 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2556520738
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 60.7%

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: Oct 31
Current: £7,673 GBP|Low: £3,694 GBP|High: £8,128 GBP|Avg: £5,473 GBP|-1.9%
Retailer 1
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
November 1, 2026
Retailer 10£4,176 GBP
Retailer 13£4,228 GBP
Retailer 14£4,350 GBP
Retailer 2£4,354 GBP
Retailer 15£4,409 GBP
Retailer 11£4,514 GBP
Retailer 12£4,603 GBP
Retailer 5£4,687 GBP
Retailer 9£5,156 GBP
Retailer 7£5,157 GBP
Retailer 3£5,171 GBP
Retailer 4£5,173 GBP
Retailer 8£5,869 GBP
Retailer 1£7,673 GBP
Retailer 6£8,128 GBP

38 data points across 15 retailers

18 retailers£4,176 GBP to £8,128 GBP

A
Cheapest Retailer
-
£4,176 GBP
$5,596 USD
A
Retailer 2
-
£4,228 GBP
$5,665 USD
View
A
Retailer 3
-
£4,350 GBP
$5,828 USD
View
A
Retailer 4
-
£4,354 GBP
$5,834 USD
View
A
Retailer 5
-
£4,409 GBP
$5,907 USD
View
A
Retailer 6
-
£4,514 GBP
A$9,306 AUD
View
B+
Retailer 7
-
£4,603 GBP
$6,168 USD
View
Final sale: no returns
Retailer 8
-
£5,078 GBP
$6,804 USD
View
Price last confirmed 31 days ago
Retailer 9
-
£5,156 GBP
$6,908 USD
View
Price last confirmed 33 days ago
B+
Retailer 10
-
£5,156 GBP
View
Retailer 11
-
£5,157 GBP
$6,910 USD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£5,171 GBP
$6,928 USD
View
B+
Retailer 13
-
£5,173 GBP
$6,931 USD
View
Retailer 14
-
£5,859 GBP
$7,851 USD
View
Price last confirmed 33 days ago
B+
Retailer 15
-
£5,869 GBP
€7,489 EUR
View
B
Retailer 16
-
£7,673 GBP
View
B
Retailer 17
-
£8,128 GBP
$10,891 USD
View
Most Expensive
NZ Jewellers
0e9bb4a0-df40-447b-bf38-7b3545a180d1 · Sep 28
£9,375 GBP
$12,561 USD
View
Price last confirmed 34 days ago
17 more retailers have this diamond
Prices start from £4,176 GBPSave up to £3,952 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
£4,176 GBP