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Heart|Natural|GIA

1.70ct H SI1 Heart Natural Diamond

VG • H/SI1 • GIA 1557139856

Certificate GIA 1557139856

Diamond specifications and retailer prices

From £3,338 GBP
HK$35,000 HKD
As of November 2, 2026
Save £3,008 GBP (47%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £7,907 GBP at NZ Jewellers · As of September 25, 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 H 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 1557139856. Listed at 17 retailers as of November 1, 2026, with a 90% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1557139856
Dimensions6.96 × 8.00 × 5.11 mm
L/W Ratio1.15
Girdle conditionFaceted
Top View
6.96 mm8.00 mm1.70 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1557139856
Side View
Table 56.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.8%

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: Nov 2
Current: £3,733 GBP|Low: £3,291 GBP|High: £7,301 GBP|Avg: £4,445 GBP|+1.4%
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 2, 2026
Retailer 9£3,338 GBP
Retailer 13£3,517 GBP
Retailer 3£3,588 GBP
Retailer 11£3,653 GBP
Retailer 15£3,656 GBP
Retailer 1£3,733 GBP
Retailer 5£3,769 GBP
Retailer 4£3,818 GBP
Retailer 8£4,024 GBP
Retailer 12£4,261 GBP
Retailer 7£4,579 GBP
Retailer 10£5,268 GBP
Retailer 2£5,293 GBP
Retailer 14£6,347 GBP
Retailer 6£6,998 GBP

26 data points across 15 retailers

17 retailers£3,338 GBP to £6,347 GBP

A
Cheapest Retailer
-
£3,338 GBP
HK$35,000 HKD
A
Retailer 2
-
£3,517 GBP
$4,720 USD
View
A
Retailer 3
-
£3,588 GBP
$4,815 USD
View
B+
Retailer 4
-
£3,653 GBP
$4,902 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,656 GBP
€4,672 EUR
View
B+
Retailer 6
-
£3,733 GBP
$5,009 USD
View
B+
Retailer 7
-
£3,769 GBP
$5,058 USD
View
B+
Retailer 8
-
£3,818 GBP
$5,123 USD
View
B+
Retailer 9
-
£4,024 GBP
$5,400 USD
View
B+
Retailer 10
-
£4,261 GBP
View
Retailer 11
-
£4,579 GBP
A$9,454 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
£4,862 GBP
A$10,038 AUD
View
B+
Retailer 13
-
£5,268 GBP
$7,070 USD
View
B+
Retailer 14
-
£5,293 GBP
ZAR 114,740 ZAR
View
B
Retailer 15
-
£6,347 GBP
View
Retailer 16
-
£6,998 GBP
$9,391 USD
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
ae520143-2145-4f76-b950-2c229f44c133 · Sep 25
£7,907 GBP
$10,611 USD
View
Price last confirmed 38 days ago
16 more retailers have this diamond
Prices start from £3,338 GBPSave up to £3,008 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 Heart
£3,338 GBP