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Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 7541377009

Certificate GIA 7541377009

Diamond specifications and retailer prices

From £535 GBP
As of November 6, 2026
Save £851 GBP (61%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,111 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7541377009. Listed at 11 retailers as of November 4, 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. 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

0.90
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle38.2°
OriginNatural
Grading LabGIA
CertificateGIA 7541377009
Dimensions5.71 × 6.63 × 3.95 mm
L/W Ratio1.16
Girdle conditionFaceted
Top View
5.71 mm6.63 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7541377009
Side View
Table 58.0%CrownGirdle: STK-VTKPavilion 38.2°Culet: NoneDepth 59.6%

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: £732 GBP|Low: £535 GBP|High: £1,589 GBP|Avg: £910 GBP|-7.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 10£535 GBP
Retailer 9£699 GBP
Retailer 2£710 GBP
Retailer 1£732 GBP
Retailer 3£739 GBP
Retailer 7£788 GBP
Retailer 4£899 GBP
Retailer 8£1,089 GBP
Retailer 5£1,109 GBP
Retailer 6£1,386 GBP

37 data points across 10 retailers

11 retailers£535 GBP to £1,386 GBP

A
Cheapest Retailer
-
£535 GBP
A
Retailer 2
-
£699 GBP
View
Final sale: no returns
A
Retailer 3
-
£710 GBP
View
A
Retailer 4
-
£732 GBP
View
A
Retailer 5
-
£739 GBP
View
B+
Retailer 6
-
£788 GBP
View
B+
Retailer 7
-
£899 GBP
View
B+
Retailer 8
-
£1,089 GBP
View
B+
Retailer 9
-
£1,109 GBP
View
B
Retailer 10
-
£1,386 GBP
View
Most Expensive
NZ Jewellers
0ead3968-d841-4e00-933a-4e78b6fd3ba9 · Sep 25
£2,111 GBP
$2,825 USD
View
Price last confirmed 42 days ago
10 more retailers have this diamond
Prices start from £535 GBPSave up to £851 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
0.90ct Heart
£535 GBP