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Heart|Natural|GIA

1.70ct J SI1 Heart Natural Diamond

EX • J/SI1

Diamond specifications and retailer prices

From £3,607 GBP
CA$6,723 CAD
As of October 30, 2026
Save £3,191 GBP (47%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,798 GBP at NZ Jewellers · As of November 3, 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. Listed at 17 retailers as of November 2, 2026, with prices from £3,607 to £6,798, a £3,191 spread on the same certified stone. NZ Jewellers lists it at £6,798. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions6.82 × 8.01 × 5.07 mm
L/W Ratio1.17
Top View
6.82 mm8.01 mm1.70 ctJ / SI1
OriginNatural
CutExcellent
PolishGood
SymmetryGood
FluorescenceNone
CertificateGIA
Side View
Table 56.0%CrownGirdle: ThinPavilionCuletDepth 63.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £6,798 GBP|Low: £3,607 GBP|High: £6,798 GBP|Avg: £4,174 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2£3,607 GBP
Retailer 6£3,683 GBP
Retailer 8£3,683 GBP
Retailer 9£3,683 GBP
Retailer 4£3,774 GBP
Retailer 3£3,911 GBP
Retailer 5£4,054 GBP
Retailer 7£4,249 GBP
NZ Jewellers£6,798 GBP

36 data points across 9 retailers

17 retailers£3,607 GBP to £6,798 GBP

B
Cheapest Retailer
-
£3,607 GBP
CA$6,723 CAD
B
Retailer 2
-
£3,607 GBP
CA$6,723 CAD
View
Retailer 3
-
£3,683 GBP
$4,942 USD
View
Price last confirmed 33 days ago
B
Retailer 4
-
£3,683 GBP
$4,942 USD
View
Retailer 5
-
£3,683 GBP
$4,942 USD
View
Price last confirmed 32 days ago
B
Retailer 6
-
£3,683 GBP
$4,942 USD
View
B
Retailer 7
-
£3,683 GBP
$4,942 USD
View
B
Retailer 8
-
£3,774 GBP
$5,065 USD
View
B
Retailer 9
-
£3,774 GBP
$5,065 USD
View
B
Retailer 10
-
£3,911 GBP
View
B
Retailer 11
-
£4,054 GBP
$5,440 USD
View
B
Retailer 12
-
£4,054 GBP
$5,440 USD
View
Retailer 13
-
£4,249 GBP
$5,702 USD
View
Price last confirmed 57 days ago
B
Retailer 14
-
£4,249 GBP
$5,702 USD
View
Retailer 15
-
£4,249 GBP
$5,702 USD
View
Price last confirmed 34 days ago
Retailer 16
-
£6,798 GBP
$9,123 USD
View
Price last confirmed 33 days ago
Most Expensive
C
NZ Jewellers
4ac71049-29d8-470d-b9d1-413b2e6939f0 · Nov 3
£6,798 GBP
$9,123 USD
View
16 more retailers have this diamond
Prices start from £3,607 GBPSave up to £3,191 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.

B
1.70ct Heart
£3,607 GBP