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Heart|Natural|GIA

1.00ct H SI1 Heart Natural Diamond

ID • H/SI1 • GIA 1555914398

Certificate GIA 1555914398

Diamond specifications and retailer prices

From £1,127 GBP
HK$11,800 HKD
As of November 1, 2026
Save £2,119 GBP (65%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £3,246 GBP at Queensmith · As of October 28, 2026
View at Queensmith

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 1555914398. Listed at 23 retailers as of October 28, 2026, with prices from £1,127 to £3,246, a £2,119 spread on the same certified stone. Queensmith lists it at £3,246. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555914398
Dimensions6.41 × 7.05 × 3.84 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cloud, Crystal, Needle
Top View
6.41 mm7.05 mm1.00 ctH / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555914398
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 54.5%

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: £3,246 GBP|Low: £1,127 GBP|High: £3,256 GBP|Avg: £1,828 GBP|+3.0%
Queensmith
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
November 2, 2026
Retailer 17£1,127 GBP
Retailer 15£1,199 GBP
Retailer 14£1,383 GBP
Retailer 10£1,392 GBP
Retailer 9£1,406 GBP
Retailer 2£1,462 GBP
Retailer 4£1,508 GBP
Retailer 8£1,508 GBP
Retailer 3£1,534 GBP
Retailer 5£1,578 GBP
Retailer 12£1,602 GBP
Retailer 13£1,644 GBP
Retailer 6£1,740 GBP
Retailer 18£1,854 GBP
Retailer 11£2,047 GBP
Retailer 16£2,644 GBP
Retailer 7£3,154 GBP
Queensmith£3,246 GBP

22 data points across 18 retailers

23 retailers£1,127 GBP to £3,246 GBP

A
Cheapest Retailer
-
£1,127 GBP
HK$11,800 HKD
A
Retailer 2
-
£1,199 GBP
₹152,983 INR
View
B+
Retailer 3
-
£1,383 GBP
$1,853 USD
View
Final sale: no returns
B+
Retailer 4
-
£1,392 GBP
SGD 2,521 SGD
View
B+
Retailer 5
-
£1,406 GBP
$1,884 USD
View
B+
Retailer 6
-
£1,422 GBP
$1,905 USD
View
B+
Retailer 7
-
£1,462 GBP
View
B+
Retailer 8
-
£1,508 GBP
$2,021 USD
View
B+
Retailer 9
-
£1,508 GBP
$2,021 USD
View
B+
Retailer 10
-
£1,534 GBP
$2,055 USD
View
B+
Retailer 11
-
£1,547 GBP
A$3,188 AUD
View
B+
Retailer 12
-
£1,572 GBP
SGD 2,846 SGD
View
B+
Retailer 13
-
£1,575 GBP
$2,110 USD
View
B+
Retailer 14
-
£1,578 GBP
$2,115 USD
View
B+
Retailer 15
-
£1,602 GBP
$2,146 USD
View
B+
Retailer 16
-
£1,644 GBP
View
B+
Retailer 17
-
£1,740 GBP
$2,332 USD
View
B+
Retailer 18
-
£1,854 GBP
ZAR 40,139 ZAR
View
Retailer 19
-
£1,872 GBP
A$3,860 AUD
View
Price last confirmed 27 days ago
B+
Retailer 20
-
£2,047 GBP
€2,612 EUR
View
B
Retailer 21
-
£2,644 GBP
View
B
Retailer 22
-
£3,154 GBP
$4,226 USD
View
Most Expensive
B
Queensmith
1555914398 · Oct 28
£3,246 GBP
View
22 more retailers have this diamond
Prices start from £1,127 GBPSave up to £2,119 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
£1,127 GBP