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Heart|Natural|GIA

1.00ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 1489291904

Certificate GIA 1489291904

Diamond specifications and retailer prices

From £1,250 GBP
HK$13,100 HKD
As of November 1, 2026
Save £2,262 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,511 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 1489291904. Listed at 19 retailers as of October 30, 2026, with prices from £1,250 to £3,511, a £2,262 spread on the same certified stone. NZ Jewellers lists it at £3,511. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle1°
Pavilion angle1°
OriginNatural
Grading LabGIA
CertificateGIA 1489291904
Dimensions5.79 × 6.76 × 4.17 mm
L/W Ratio1.17
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
5.79 mm6.76 mm1.00 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1489291904
Side View
Table 58.0%Crown 1°Girdle: ETK-ETKPavilion 1°Culet: NoneDepth 61.7%

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: £3,511 GBP|Low: £1,236 GBP|High: £3,596 GBP|Avg: £1,971 GBP|-2.3%
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 12£1,250 GBP
Retailer 5£1,472 GBP
Retailer 4£1,517 GBP
Retailer 7£1,550 GBP
Retailer 16£1,589 GBP
Retailer 3£1,680 GBP
Retailer 9£1,680 GBP
Retailer 19£1,684 GBP
Retailer 8£1,735 GBP
Retailer 15£1,757 GBP
Retailer 18£1,783 GBP
Retailer 2£1,843 GBP
Retailer 17£1,937 GBP
Retailer 6£1,959 GBP
Retailer 13£2,064 GBP
Retailer 11£2,118 GBP
Retailer 10£2,413 GBP
Retailer 14£2,958 GBP
NZ Jewellers£3,511 GBP

45 data points across 19 retailers

19 retailers£1,250 GBP to £3,511 GBP

A
Cheapest Retailer
-
£1,250 GBP
HK$13,100 HKD
B+
Retailer 2
-
£1,472 GBP
$1,976 USD
View
B+
Retailer 3
-
£1,517 GBP
$2,036 USD
View
B+
Retailer 4
-
£1,550 GBP
$2,080 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,589 GBP
$2,133 USD
View
B+
Retailer 6
-
£1,680 GBP
$2,254 USD
View
B+
Retailer 7
-
£1,680 GBP
$2,254 USD
View
B+
Retailer 8
-
£1,684 GBP
$2,260 USD
View
B
Retailer 9
-
£1,735 GBP
SGD 3,146 SGD
View
B
Retailer 10
-
£1,757 GBP
$2,358 USD
View
B
Retailer 11
-
£1,783 GBP
$2,393 USD
View
B+
Retailer 12
-
£1,843 GBP
View
B+
Retailer 13
-
£1,937 GBP
$2,600 USD
View
B
Retailer 14
-
£1,959 GBP
$2,629 USD
View
B
Retailer 15
-
£2,064 GBP
ZAR 44,752 ZAR
View
Retailer 16
-
£2,118 GBP
A$4,372 AUD
View
Price last confirmed 25 days ago
B
Retailer 17
-
£2,413 GBP
$3,238 USD
View
B
Retailer 18
-
£2,958 GBP
View
Most Expensive
B
NZ Jewellers
468513ec-9b8d-4a44-bbbc-c7da6172cc2c · Oct 30
£3,511 GBP
$4,712 USD
View
18 more retailers have this diamond
Prices start from £1,250 GBPSave up to £2,262 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
1.00ct Heart
£1,250 GBP