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Heart|Natural|GIA

1.70ct J SI1 Heart Natural Diamond

VG • J/SI1 • GIA 6431422487

Certificate GIA 6431422487

Diamond specifications and retailer prices

From £3,065 GBP
SGD 5,559 SGD
As of October 31, 2026
Save £3,312 GBP (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,377 GBP at NZ Jewellers · As of October 30, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6431422487. Listed at 18 retailers as of October 30, 2026, with prices from £3,065 to £6,377, a £3,312 spread on the same certified stone. NZ Jewellers lists it at £6,377. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle40.7°
Pavilion angle41.9°
OriginNatural
Grading LabGIA
CertificateGIA 6431422487
Dimensions8.06 × 7.23 × 4.33 mm
L/W Ratio1.11
Top View
8.06 mm7.23 mm1.70 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6431422487
Side View
Table 56.0%Crown 40.7°Girdle: STK-ETKPavilion 41.9°Culet: NoneDepth 59.9%

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: Oct 31
Current: £6,377 GBP|Low: £3,065 GBP|High: £6,377 GBP|Avg: £3,880 GBP
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
Retailer 17
Retailer 18
November 2, 2026
Retailer 4£3,065 GBP
Retailer 18£3,080 GBP
Retailer 10£3,192 GBP
Retailer 5£3,379 GBP
Retailer 3£3,447 GBP
Retailer 2£3,522 GBP
Retailer 11£3,640 GBP
Retailer 15£3,660 GBP
Retailer 16£3,660 GBP
Retailer 17£3,660 GBP
Retailer 6£3,690 GBP
Retailer 7£3,740 GBP
Retailer 9£3,773 GBP
Retailer 8£3,868 GBP
Retailer 14£4,224 GBP
Retailer 13£4,500 GBP
Retailer 12£5,831 GBP
NZ Jewellers£6,377 GBP

32 data points across 18 retailers

18 retailers£3,065 GBP to £6,377 GBP

B+
Cheapest Retailer
-
£3,065 GBP
SGD 5,559 SGD
B+
Retailer 2
-
£3,080 GBP
$4,133 USD
View
B+
Retailer 3
-
£3,192 GBP
$4,284 USD
View
B+
Retailer 4
-
£3,379 GBP
$4,534 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,447 GBP
$4,625 USD
View
B+
Retailer 6
-
£3,522 GBP
View
B+
Retailer 7
-
£3,640 GBP
View
B
Retailer 8
-
£3,660 GBP
$4,912 USD
View
B
Retailer 9
-
£3,660 GBP
$4,912 USD
View
Retailer 10
-
£3,660 GBP
$4,912 USD
View
Price last confirmed 9 days ago
Retailer 11
-
£3,690 GBP
A$7,619 AUD
View
Price last confirmed 24 days ago
B
Retailer 12
-
£3,740 GBP
$5,018 USD
View
B
Retailer 13
-
£3,773 GBP
$5,064 USD
View
B
Retailer 14
-
£3,868 GBP
$5,190 USD
View
B
Retailer 15
-
£4,224 GBP
$5,668 USD
View
B
Retailer 16
-
£4,500 GBP
ZAR 97,549 ZAR
View
B
Retailer 17
-
£5,831 GBP
View
Most Expensive
C
NZ Jewellers
9be0e4a2-93b6-416f-97c9-bfaaaf15adb7 · Oct 30
£6,377 GBP
$8,558 USD
View
17 more retailers have this diamond
Prices start from £3,065 GBPSave up to £3,312 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
£3,065 GBP