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Heart|Natural|GIA

1.70ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 2537925451

Certificate GIA 2537925451

Diamond specifications and retailer prices

From £3,310 GBP
HK$34,700 HKD
As of November 2, 2026
Save £3,123 GBP (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £7,339 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 2537925451. Listed at 18 retailers as of November 2, 2026, with a 94% 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2537925451
Dimensions7.19 × 8.19 × 4.88 mm
L/W Ratio1.14
Top View
7.19 mm8.19 mm1.70 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537925451
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 59.6%

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: £6,433 GBP|Low: £3,300 GBP|High: £6,576 GBP|Avg: £4,477 GBP|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 4£3,310 GBP
Retailer 3£3,512 GBP
Retailer 10£3,792 GBP
Retailer 9£3,910 GBP
Retailer 6£4,030 GBP
Retailer 7£4,259 GBP
Retailer 2£4,418 GBP
Retailer 5£4,482 GBP
Retailer 8£5,392 GBP
Retailer 1£6,433 GBP

40 data points across 10 retailers

18 retailers£3,310 GBP to £6,433 GBP

B+
Cheapest Retailer
-
£3,310 GBP
HK$34,700 HKD
B+
Retailer 2
-
£3,512 GBP
₹448,832 INR
View
Retailer 3
-
£3,792 GBP
SGD 6,877 SGD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
£3,910 GBP
SGD 7,091 SGD
View
B
Retailer 5
-
£4,030 GBP
$5,408 USD
View
Final sale: no returns
B+
Retailer 6
-
£4,067 GBP
$5,457 USD
View
B+
Retailer 7
-
£4,069 GBP
$5,460 USD
View
B
Retailer 8
-
£4,252 GBP
A$8,778 AUD
View
B+
Retailer 9
-
£4,259 GBP
View
Retailer 10
-
£4,388 GBP
$5,889 USD
View
Price last confirmed 18 days ago
Retailer 11
-
£4,388 GBP
$5,889 USD
View
Price last confirmed 17 days ago
Retailer 12
-
£4,388 GBP
$5,889 USD
View
Price last confirmed 15 days ago
Retailer 13
-
£4,418 GBP
A$9,120 AUD
View
Price last confirmed 24 days ago
B
Retailer 14
-
£4,482 GBP
$6,015 USD
View
Retailer 15
-
£5,064 GBP
$6,795 USD
View
Price last confirmed 15 days ago
B
Retailer 16
-
£5,392 GBP
ZAR 116,889 ZAR
View
B
Retailer 17
-
£6,433 GBP
View
Most Expensive
NZ Jewellers
757a0c92-cc31-4100-b482-86a769ea811a · Oct 18
£7,339 GBP
$9,849 USD
View
Price last confirmed 16 days ago
17 more retailers have this diamond
Prices start from £3,310 GBPSave up to £3,123 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
£3,310 GBP