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Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6227787766

Certificate GIA 6227787766

Diamond specifications and retailer prices

From £498 GBP
As of November 5, 2026
Save £326 GBP (40%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £825 GBP at 77 Diamonds · As of November 5, 2026
View at 77 Diamonds

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 6227787766. Listed at 5 retailers as of November 5, 2026, with prices from £498 to £825, a £326 spread on the same certified stone. 77 Diamonds lists it at £825. 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
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6227787766
Dimensions6.06 × 6.52 × 3.87 mm
L/W Ratio1.08
Girdle conditionFaceted
Cert comments
Pinpoints are not shown. Surface graining is not shown.
Key to symbols
Crystal
Top View
6.06 mm6.52 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 6227787766
Side View
Table 54.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 59.3%

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 5
Current: £825 GBP|Low: £498 GBP|High: £834 GBP|Avg: £637 GBP|+1.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4£498 GBP
Retailer 5£500 GBP
Retailer 3£585 GBP
Retailer 2£777 GBP
77 Diamonds£825 GBP

42 data points across 5 retailers

5 retailers£498 GBP to £825 GBP

A
Cheapest Retailer
-
£498 GBP
A
Retailer 2
-
£500 GBP
View
B+
Retailer 3
-
£585 GBP
View
B+
Retailer 4
-
£777 GBP
View
Most Expensive
B+
77 Diamonds
HSMB5WHPCK2D · Nov 5
£825 GBP
View
4 more retailers have this diamond
Prices start from £498 GBPSave up to £326 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
£498 GBP