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Heart|Natural|GIA

1.73ct H SI1 Heart Natural Diamond

VG • H/SI1 • GIA 1553154890

Certificate GIA 1553154890

Diamond specifications and retailer prices

From £3,487 GBP
HK$36,500 HKD
As of November 1, 2026
Save £3,252 GBP (48%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £8,415 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.73ct natural heart diamond

This 1.73ct 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 1553154890. Listed at 17 retailers as of November 1, 2026, with a 93% 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

1.73
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553154890
Dimensions7.08 × 8.30 × 4.86 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
7.08 mm8.30 mm1.73 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553154890
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.5%

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 1
Current: £5,575 GBP|Low: £3,473 GBP|High: £7,705 GBP|Avg: £4,688 GBP|-4.8%
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 13£3,487 GBP
Retailer 12£3,517 GBP
Retailer 10£3,726 GBP
Retailer 15£3,861 GBP
Retailer 8£3,875 GBP
Retailer 3£3,952 GBP
Retailer 5£3,988 GBP
Retailer 11£4,202 GBP
Retailer 9£4,446 GBP
Retailer 4£4,473 GBP
Retailer 7£4,760 GBP
Retailer 1£5,575 GBP
Retailer 2£5,620 GBP
Retailer 14£6,739 GBP
Retailer 6£7,397 GBP

28 data points across 15 retailers

17 retailers£3,487 GBP to £6,739 GBP

A
Cheapest Retailer
-
£3,487 GBP
HK$36,500 HKD
A
Retailer 2
-
£3,517 GBP
$4,712 USD
View
A
Retailer 3
-
£3,726 GBP
$4,993 USD
View
B+
Retailer 4
-
£3,861 GBP
€4,927 EUR
View
B+
Retailer 5
-
£3,875 GBP
$5,192 USD
View
Final sale: no returns
B+
Retailer 6
-
£3,952 GBP
$5,295 USD
View
B+
Retailer 7
-
£3,988 GBP
$5,343 USD
View
B+
Retailer 8
-
£4,202 GBP
$5,630 USD
View
B+
Retailer 9
-
£4,446 GBP
View
B+
Retailer 10
-
£4,473 GBP
$5,993 USD
View
Retailer 11
-
£4,760 GBP
A$9,811 AUD
View
Price last confirmed 23 days ago
B
Retailer 12
-
£5,112 GBP
A$10,538 AUD
View
B+
Retailer 13
-
£5,575 GBP
$7,470 USD
View
B+
Retailer 14
-
£5,620 GBP
ZAR 121,645 ZAR
View
B
Retailer 15
-
£6,739 GBP
View
Retailer 16
-
£7,397 GBP
$9,911 USD
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
e9b70d29-f4e5-46f4-9fa0-7b0376c77384 · Sep 25
£8,415 GBP
$11,275 USD
View
Price last confirmed 38 days ago
16 more retailers have this diamond
Prices start from £3,487 GBPSave up to £3,252 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
1.73ct Heart
£3,487 GBP