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Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 1549115288

Certificate GIA 1549115288

Diamond specifications and retailer prices

From £554 GBP
As of November 4, 2026
Save £130 GBP (19%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £684 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

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 1549115288. Listed at 6 retailers as of November 4, 2026, with prices from £554 to £684, a £130 spread on the same certified stone. Blue Nile lists it at £684. 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
OriginNatural
Grading LabGIA
CertificateGIA 1549115288
Dimensions5.55 × 6.71 × 4.10 mm
L/W Ratio1.21
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
5.55 mm6.71 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549115288
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.1%

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 4
Current: £684 GBP|Low: £486 GBP|High: £769 GBP|Avg: £621 GBP|-11.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4£554 GBP
Retailer 6£555 GBP
Retailer 3£604 GBP
Retailer 5£619 GBP
Retailer 2£643 GBP
Blue Nile£684 GBP

41 data points across 6 retailers

6 retailers£554 GBP to £684 GBP

A
Cheapest Retailer
-
£554 GBP
Final sale: no returns
A
Retailer 2
-
£555 GBP
View
A
Retailer 3
-
£604 GBP
View
A
Retailer 4
-
£619 GBP
View
A
Retailer 5
-
£643 GBP
View
Most Expensive
A
Blue Nile
27439294 · Nov 5
£684 GBP
$916 USD
View
5 more retailers have this diamond
Prices start from £554 GBPSave up to £130 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
£554 GBP