CaratHunter
Plans
Heart|Natural|GIA

0.91ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 5556326450

Certificate GIA 5556326450

Diamond specifications and retailer prices

From £619 GBP
$830 USD
As of November 1, 2026
Save £1,367 GBP (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,986 GBP at Moon Ocean · As of November 2, 2026
View at Moon Ocean

About this 0.91ct natural heart diamond

This 0.91ct natural heart sits in the just-under-one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5556326450. Listed at 15 retailers as of November 1, 2026, with prices from £619 to £1,986, a £1,367 spread on the same certified stone. Moon Ocean lists it at £1,986. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5556326450
Dimensions6.65 × 5.58 × 4.03 mm
L/W Ratio1.19
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Etch Channel, Crystal, Needle, Indented Natural
Top View
6.65 mm5.58 mm0.91 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5556326450
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 60.6%

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: £1,986 GBP|Low: £510 GBP|High: £1,998 GBP|Avg: £971 GBP|+0.8%
Moon Ocean
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 7£619 GBP
Retailer 8£634 GBP
Retailer 5£636 GBP
Retailer 6£661 GBP
Retailer 14£696 GBP
Retailer 16£696 GBP
Retailer 15£722 GBP
Retailer 9£786 GBP
Retailer 17£789 GBP
Retailer 12£802 GBP
Retailer 3£851 GBP
Retailer 18£851 GBP
Retailer 4£873 GBP
Retailer 10£1,016 GBP
Retailer 11£1,077 GBP
Retailer 2£1,406 GBP
Retailer 13£1,872 GBP
Moon Ocean£1,986 GBP

27 data points across 18 retailers

15 retailers£619 GBP to £1,986 GBP

A
Cheapest Retailer
-
£619 GBP
$830 USD
A
Retailer 2
-
£634 GBP
$850 USD
View
A
Retailer 3
-
£661 GBP
$885 USD
View
A
Retailer 4
-
£696 GBP
$932 USD
View
A
Retailer 5
-
£696 GBP
$932 USD
View
A
Retailer 6
-
£722 GBP
$968 USD
View
A
Retailer 7
-
£789 GBP
$1,057 USD
View
A
Retailer 8
-
£802 GBP
$1,075 USD
View
A
Retailer 9
-
£851 GBP
$1,140 USD
View
A
Retailer 10
-
£851 GBP
$1,140 USD
View
A
Retailer 11
-
£873 GBP
$1,170 USD
View
B+
Retailer 12
-
£1,077 GBP
€1,374 EUR
View
B+
Retailer 13
-
£1,406 GBP
View
B
Retailer 14
-
£1,872 GBP
$2,508 USD
View
Most Expensive
B
Moon Ocean
NVN-FF42C4091-450 · Nov 2
£1,986 GBP
View
14 more retailers have this diamond
Prices start from £619 GBPSave up to £1,367 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
£619 GBP