Heart|Natural|GIA

1.00ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 3545958579

Certificate GIA 3545958579

Diamond specifications and retailer prices

From £1,329 GBP
As of November 6, 2026
Save £1,744 GBP (57%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,668 GBP at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3545958579. Listed at 21 retailers as of November 2, 2026, with a 131% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3545958579
Dimensions6.24 × 6.77 × 4.02 mm
L/W Ratio1.08
Top View
6.24 mm6.77 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 3545958579
Side View
Table 63.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 59.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,400 GBP|Low: £1,319 GBP|High: £3,463 GBP|Avg: £1,999 GBP|-4.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10£1,329 GBP
Retailer 1£1,400 GBP
Retailer 8£1,563 GBP
Retailer 3£1,619 GBP
Retailer 12£1,659 GBP
Retailer 4£1,851 GBP
Retailer 2£1,858 GBP
Retailer 6£1,907 GBP
Retailer 7£2,141 GBP
Retailer 5£2,177 GBP
Retailer 9£3,073 GBP
Retailer 11£3,449 GBP

29 data points across 12 retailers

21 retailers£1,329 GBP to £3,073 GBP

A
Cheapest Retailer
-
£1,329 GBP
A
Retailer 2
-
£1,400 GBP
View
A
Retailer 3
-
£1,563 GBP
View
B+
Retailer 4
-
£1,619 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,659 GBP
View
B+
Retailer 6
-
£1,674 GBP
View
B+
Retailer 7
-
£1,677 GBP
View
Retailer 8
-
£1,754 GBP
View
Price last confirmed 21 days ago
Retailer 9
-
£1,754 GBP
View
Price last confirmed 19 days ago
B+
Retailer 10
-
£1,801 GBP
View
Retailer 11
-
£1,836 GBP
View
Price last confirmed 21 days ago
B+
Retailer 12
-
£1,851 GBP
View
B+
Retailer 13
-
£1,858 GBP
View
B+
Retailer 14
-
£1,907 GBP
View
Retailer 15
-
£2,024 GBP
View
Price last confirmed 18 days ago
B+
Retailer 16
-
£2,141 GBP
View
B+
Retailer 17
-
£2,177 GBP
View
Retailer 18
-
£2,197 GBP
View
Price last confirmed 30 days ago
B
Retailer 19
-
£3,073 GBP
View
Retailer 20
-
£3,449 GBP
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
6213d67b-5b17-4436-b1a0-fae91a189144 · Oct 18
£3,668 GBP
$4,909 USD
View
Price last confirmed 19 days ago
20 more retailers have this diamond
Prices start from £1,329 GBPSave up to £1,744 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
£1,329 GBP