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Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6542397714

Certificate GIA 6542397714

Diamond specifications and retailer prices

From £449 GBP
As of November 6, 2026
Save £671 GBP (60%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,163 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 6542397714. Listed at 13 retailers as of November 2, 2026, with a 149% 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
SymmetryVery Good
FluorescenceNone
Pavilion angle38.9°
OriginNatural
Grading LabGIA
CertificateGIA 6542397714
Dimensions5.71 × 6.75 × 4.03 mm
L/W Ratio1.18
Top View
5.71 mm6.75 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542397714
Side View
Table 58.0%CrownGirdle: MED-VTKPavilion 38.9°Culet: NoneDepth 59.7%

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: £651 GBP|Low: £449 GBP|High: £1,263 GBP|Avg: £764 GBP|-14.5%
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 7, 2026
Retailer 12£449 GBP
Retailer 10£565 GBP
Retailer 3£605 GBP
Retailer 6£629 GBP
Retailer 5£631 GBP
Retailer 11£631 GBP
Retailer 1£651 GBP
Retailer 4£784 GBP
Retailer 7£798 GBP
Retailer 8£896 GBP
Retailer 9£934 GBP
Retailer 2£1,120 GBP

37 data points across 12 retailers

13 retailers£449 GBP to £1,120 GBP

A
Cheapest Retailer
-
£449 GBP
A
Retailer 2
-
£565 GBP
View
Final sale: no returns
A
Retailer 3
-
£605 GBP
View
A
Retailer 4
-
£629 GBP
View
A
Retailer 5
-
£631 GBP
View
A
Retailer 6
-
£631 GBP
View
A
Retailer 7
-
£651 GBP
View
B+
Retailer 8
-
£784 GBP
View
B+
Retailer 9
-
£798 GBP
View
B+
Retailer 10
-
£896 GBP
View
B+
Retailer 11
-
£934 GBP
View
B+
Retailer 12
-
£1,120 GBP
View
Most Expensive
NZ Jewellers
96717b14-6037-4173-b8d9-9846d49afc09 · Sep 25
£2,163 GBP
$2,895 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from £449 GBPSave up to £671 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
£449 GBP