Heart|Natural|GIA

1.70ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 1559659348

Certificate GIA 1559659348

Diamond specifications and retailer prices

From £3,291 GBP

HK$34,500 HKD

As of November 2, 2026

Save £3,176 GBP (49%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: £7,378 GBP at NZ Jewellers · As of October 18, 2026

View at NZ Jewellers

About this 1.7ct natural heart diamond

This 1.7ct natural heart sits in the one-and-a-half to two carat band, graded J 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 1559659348. Listed at 19 retailers as of November 2, 2026, with a 97% 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

Colour

SI1

Clarity

Excellent

Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

OriginNatural

Grading LabGIA

CertificateGIA 1559659348

Dimensions7.66 × 8.51 × 4.70 mm

L/W Ratio1.11

Girdle conditionFaceted

Culet sizeNone

Key to symbols

Cloud, Feather, Crystal, Needle, Natural

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

CertificateGIA 1559659348

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2

Current: £4,282 GBP|Low: £3,281 GBP|High: £6,577 GBP|Avg: £4,380 GBP|-1.0%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

November 3, 2026

Retailer 6£3,291 GBP

Retailer 5£3,494 GBP

Retailer 3£3,772 GBP

Retailer 2£3,891 GBP

Retailer 9£4,051 GBP

Retailer 1£4,282 GBP

Retailer 11£4,435 GBP

Retailer 8£4,505 GBP

Retailer 7£4,795 GBP

Retailer 10£5,420 GBP

Retailer 4£6,467 GBP

31 data points across 11 retailers

19 retailers£3,291 GBP to £6,467 GBP

B+

Cheapest Retailer

£3,291 GBP

HK$34,500 HKD

B+

Retailer 2

£3,494 GBP

₹446,554 INR

View

Retailer 3

£3,772 GBP

SGD 6,841 SGD

View

Price last confirmed 7 days ago

B+

Retailer 4

£3,891 GBP

SGD 7,056 SGD

View

B+

Retailer 5

£4,046 GBP

$5,429 USD

View

B+

Retailer 6

£4,046 GBP

$5,430 USD

View

B+

Retailer 7

£4,051 GBP

$5,436 USD

View

Final sale: no returns

Retailer 8

£4,237 GBP

A$8,748 AUD

View

B+

Retailer 9

£4,282 GBP

View

Retailer 10

£4,412 GBP

$5,920 USD

View

Price last confirmed 18 days ago

Retailer 11

£4,412 GBP

$5,920 USD

View

Price last confirmed 16 days ago

Retailer 12

£4,412 GBP

$5,920 USD

View

Price last confirmed 17 days ago

Retailer 13

£4,435 GBP

A$9,157 AUD

View

Price last confirmed 15 days ago

Retailer 14

£4,505 GBP

$6,046 USD

View

Retailer 15

£4,795 GBP

€6,128 EUR

View

Retailer 16

£5,090 GBP

$6,831 USD

View

Price last confirmed 15 days ago

Retailer 17

£5,420 GBP

ZAR 117,501 ZAR

View

Retailer 18

£6,467 GBP

View

Most Expensive

NZ Jewellers

a3545e9c-b1bf-415c-98b7-4ec2331e6c66 · Oct 18

£7,378 GBP

$9,901 USD

View

Price last confirmed 16 days ago

18 more retailers have this diamond

Prices start from £3,291 GBPSave up to £3,176 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.

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B+

1.70ct Heart

£3,291 GBP