CaratHunter
Plans
Heart|Natural|GIA

0.91ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 6183940304

Certificate GIA 6183940304

Diamond specifications and retailer prices

From £1,876 GBP
€2,397 EUR
As of November 2, 2026
Save £1,718 GBP (48%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,593 GBP at MOH London · As of November 1, 2026
View at MOH London

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 6183940304. Listed at 6 retailers as of November 1, 2026, with prices from £1,876 to £3,593, a £1,718 spread on the same certified stone. MOH London lists it at £3,593. 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
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6183940304
Dimensions5.43 × 5.95 × 3.24 mm
L/W Ratio1.10
Top View
5.43 mm5.95 mm0.91 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6183940304
Side View
Table 61.0%CrownGirdle: Extremely ThickPavilionCulet: ELGDepth 54.5%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £3,593 GBP|Low: £2,040 GBP|High: £3,636 GBP|Avg: £2,466 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£2,040 GBP
Retailer 5£2,156 GBP
Retailer 3£2,192 GBP
Retailer 4£2,298 GBP
Retailer 2£2,403 GBP
Retailer 6£2,593 GBP
MOH London£3,593 GBP

41 data points across 7 retailers

6 retailers£1,876 GBP to £3,593 GBP

B
Cheapest Retailer
-
£1,876 GBP
€2,397 EUR
B
Retailer 2
-
£2,156 GBP
$2,893 USD
View
B
Retailer 3
-
£2,192 GBP
View
Retailer 4
-
£2,298 GBP
A$4,744 AUD
View
Price last confirmed 26 days ago
B
Retailer 5
-
£2,403 GBP
€3,071 EUR
View
Most Expensive
B
MOH London
E023EEE7B · Nov 1
£3,593 GBP
View
5 more retailers have this diamond
Prices start from £1,876 GBPSave up to £1,718 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.

B
0.91ct Heart
£1,876 GBP