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Heart|Natural|GIA

0.91ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 3525247509

Certificate GIA 3525247509

Diamond specifications and retailer prices

From £736 GBP
$987 USD
As of November 1, 2026
Save £850 GBP (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,011 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 0.91ct natural heart diamond

This 0.91ct natural heart sits in the just-under-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 3525247509. Listed at 15 retailers as of November 1, 2026, with a 116% 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

0.91
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.85°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 3525247509
Dimensions5.86 × 6.62 × 3.94 mm
L/W Ratio1.13
Top View
5.86 mm6.62 mm0.91 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3525247509
Side View
Table 59.0%Crown 38.85°Girdle: THK-VTKPavilion 40.2°Culet: NoneDepth 59.5%

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 1
Current: £1,509 GBP|Low: £697 GBP|High: £1,608 GBP|Avg: £1,058 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 9£736 GBP
Retailer 7£760 GBP
Retailer 2£789 GBP
Retailer 10£924 GBP
Retailer 4£939 GBP
Retailer 6£963 GBP
Retailer 8£1,078 GBP
Retailer 5£1,207 GBP
Retailer 1£1,509 GBP
Retailer 3£1,586 GBP

40 data points across 10 retailers

15 retailers£736 GBP to £1,586 GBP

A
Cheapest Retailer
-
£736 GBP
$987 USD
A
Retailer 2
-
£760 GBP
$1,020 USD
View
Final sale: no returns
A
Retailer 3
-
£789 GBP
$1,059 USD
View
Retailer 4
-
£824 GBP
$1,106 USD
View
Price last confirmed 25 days ago
Retailer 5
-
£824 GBP
$1,106 USD
View
Price last confirmed 25 days ago
Retailer 6
-
£855 GBP
$1,148 USD
View
Price last confirmed 32 days ago
A
Retailer 7
-
£924 GBP
$1,240 USD
View
B+
Retailer 8
-
£939 GBP
View
Retailer 9
-
£951 GBP
$1,276 USD
View
Price last confirmed 24 days ago
A
Retailer 10
-
£963 GBP
View
Retailer 11
-
£1,078 GBP
A$2,225 AUD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
£1,207 GBP
ZAR 26,170 ZAR
View
B+
Retailer 13
-
£1,509 GBP
View
B
Retailer 14
-
£1,586 GBP
View
Most Expensive
NZ Jewellers
fa4126a9-76d9-432e-a56c-fa71ffe002c4 · Sep 30
£2,011 GBP
$2,698 USD
View
Price last confirmed 33 days ago
14 more retailers have this diamond
Prices start from £736 GBPSave up to £850 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
0.91ct Heart
£736 GBP