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Heart|Natural|GIA

0.51ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 1533965544

Certificate GIA 1533965544

Diamond specifications and retailer prices

From £283 GBP
As of November 6, 2026
Save £93 GBP (25%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £376 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter 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 1533965544. Listed at 4 retailers as of November 5, 2026, with prices from £283 to £376, a £93 spread on the same certified stone. Blue Nile lists it at £376. 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

0.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1533965544
Dimensions4.83 × 5.63 × 3.34 mm
L/W Ratio1.17
Culet sizeNone
Key to symbols
Cloud
Top View
4.83 mm5.63 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1533965544
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.4%

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: £376 GBP|Low: £260 GBP|High: £434 GBP|Avg: £339 GBP|-13.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3£283 GBP
Retailer 4£304 GBP
Retailer 2£346 GBP
Blue Nile£376 GBP

41 data points across 4 retailers

4 retailers£283 GBP to £376 GBP

A
Cheapest Retailer
-
£283 GBP
Final sale: no returns
A
Retailer 2
-
£304 GBP
View
A
Retailer 3
-
£346 GBP
View
Most Expensive
B+
Blue Nile
27240772 · Nov 5
£376 GBP
$503 USD
View
3 more retailers have this diamond
Prices start from £283 GBPSave up to £93 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
0.51ct Heart
£283 GBP