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Heart|Natural|IGI

0.91ct H SI1 Heart Natural Diamond

VG • H/SI1 • IGI 809631953

Shape and cutting style on the report: Heart brilliant

Certificate IGI 809631953

Diamond specifications and retailer prices

From £633 GBP
₹80,881 INR
As of November 2, 2026
Save £1,006 GBP (61%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,011 GBP at NZ Jewellers · As of September 29, 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 very-good cut grade and certified by IGI 809631953. Listed at 18 retailers as of November 2, 2026, with a 159% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.91
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.7°
Pavilion angle37.7°
OriginNatural
Grading LabIGI
CertificateIGI 809631953
Dimensions6.19 × 6.58 × 3.74 mm
L/W Ratio1.06
Girdle conditionFaceted
Culet sizeNone
Top View
6.19 mm6.58 mm0.91 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 809631953
Side View
Table 61.0%Crown 39.7°Girdle: MED-THKPavilion 37.7°Culet: NoneDepth 56.8%

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 2
Current: £633 GBP|Low: £633 GBP|High: £1,649 GBP|Avg: £1,038 GBP|-0.1%
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 2, 2026
Retailer 1£633 GBP
Retailer 3£786 GBP
Retailer 4£816 GBP
Retailer 2£885 GBP
Retailer 8£950 GBP
Retailer 11£952 GBP
Retailer 7£987 GBP
Retailer 10£995 GBP
Retailer 6£1,106 GBP
Retailer 9£1,248 GBP
Retailer 12£1,562 GBP
Retailer 5£1,639 GBP

31 data points across 12 retailers

18 retailers£633 GBP to £1,639 GBP

A
Cheapest Retailer
-
£633 GBP
₹80,881 INR
B+
Retailer 2
-
£786 GBP
$1,055 USD
View
Final sale: no returns
B+
Retailer 3
-
£816 GBP
$1,095 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
B+
Retailer 6
-
£885 GBP
$1,187 USD
View
B+
Retailer 7
-
£950 GBP
$1,275 USD
View
Retailer 8
-
£951 GBP
$1,276 USD
View
Price last confirmed 39 days ago
Retailer 9
-
£951 GBP
$1,276 USD
View
Price last confirmed 34 days ago
B+
Retailer 10
-
£952 GBP
$1,277 USD
View
B+
Retailer 11
-
£987 GBP
View
B+
Retailer 12
-
£995 GBP
View
B+
Retailer 13
-
£1,106 GBP
€1,413 EUR
View
B
Retailer 14
-
£1,248 GBP
ZAR 27,049 ZAR
View
Retailer 15
-
£1,562 GBP
View
Price last confirmed 7 days ago
B
Retailer 16
-
£1,639 GBP
View
Retailer 17
-
£2,011 GBP
$2,698 USD
View
Price last confirmed 38 days ago
Most Expensive
NZ Jewellers
36eb8a4f-ecb3-4fdb-91ef-21e9a40a27e5 · Sep 29
£2,011 GBP
$2,698 USD
View
Price last confirmed 34 days ago
17 more retailers have this diamond
Prices start from £633 GBPSave up to £1,006 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
£633 GBP