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Heart|Natural|GIA

1.00ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 5373297754

Certificate GIA 5373297754

Diamond specifications and retailer prices

From £1,345 GBP
HK$14,100 HKD
As of November 1, 2026
Save £2,429 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,774 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded H 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 5373297754. Listed at 19 retailers as of October 30, 2026, with prices from £1,345 to £3,774, a £2,429 spread on the same certified stone. NZ Jewellers lists it at £3,774. 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

1.00
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5373297754
Dimensions6.23 × 6.76 × 4.02 mm
L/W Ratio1.09
Top View
6.23 mm6.76 mm1.00 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5373297754
Side View
Table 56.0%CrownGirdlePavilionCulet: NoneDepth 59.5%

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 1
Current: £3,774 GBP|Low: £1,183 GBP|High: £3,774 GBP|Avg: £1,868 GBP|+12.6%
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
Retailer 19
November 2, 2026
Retailer 15£1,345 GBP
Retailer 7£1,584 GBP
Retailer 4£1,631 GBP
Retailer 5£1,666 GBP
Retailer 18£1,695 GBP
Retailer 2£1,761 GBP
Retailer 8£1,796 GBP
Retailer 9£1,806 GBP
Retailer 19£1,806 GBP
Retailer 10£1,868 GBP
Retailer 6£1,889 GBP
Retailer 3£1,910 GBP
Retailer 13£1,929 GBP
Retailer 11£1,971 GBP
Retailer 17£2,084 GBP
Retailer 16£2,219 GBP
Retailer 12£2,254 GBP
Retailer 14£3,163 GBP
NZ Jewellers£3,774 GBP

27 data points across 19 retailers

19 retailers£1,345 GBP to £3,774 GBP

B+
Cheapest Retailer
-
£1,345 GBP
HK$14,100 HKD
B+
Retailer 2
-
£1,584 GBP
$2,125 USD
View
B
Retailer 3
-
£1,631 GBP
$2,189 USD
View
B
Retailer 4
-
£1,666 GBP
$2,236 USD
View
Final sale: no returns
B
Retailer 5
-
£1,695 GBP
$2,275 USD
View
B
Retailer 6
-
£1,761 GBP
View
B
Retailer 7
-
£1,796 GBP
$2,410 USD
View
B
Retailer 8
-
£1,806 GBP
$2,423 USD
View
B
Retailer 9
-
£1,806 GBP
$2,423 USD
View
B
Retailer 10
-
£1,868 GBP
SGD 3,387 SGD
View
B
Retailer 11
-
£1,889 GBP
$2,535 USD
View
B
Retailer 12
-
£1,910 GBP
$2,563 USD
View
B
Retailer 13
-
£1,929 GBP
View
Retailer 14
-
£1,971 GBP
A$4,069 AUD
View
Price last confirmed 27 days ago
B
Retailer 15
-
£2,084 GBP
$2,796 USD
View
B
Retailer 16
-
£2,219 GBP
ZAR 48,112 ZAR
View
B
Retailer 17
-
£2,254 GBP
€2,881 EUR
View
C
Retailer 18
-
£3,163 GBP
View
Most Expensive
C
NZ Jewellers
6b5f2e47-1db7-4726-ab8a-80bb7a4a861b · Oct 30
£3,774 GBP
$5,065 USD
View
18 more retailers have this diamond
Prices start from £1,345 GBPSave up to £2,429 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+
1.00ct Heart
£1,345 GBP