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Heart|Natural|GIA

0.53ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 1525405573

Certificate GIA 1525405573

Diamond specifications and retailer prices

From £287 GBP
As of November 6, 2026
Save £93 GBP (25%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £380 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.53ct natural heart diamond

This 0.53ct 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 1525405573. Listed at 4 retailers as of November 5, 2026, with prices from £287 to £380, a £93 spread on the same certified stone. Blue Nile lists it at £380. 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

0.53
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1525405573
Dimensions4.86 × 5.73 × 3.40 mm
L/W Ratio1.18
Culet sizeNone
Key to symbols
Cloud, Crystal
Top View
4.86 mm5.73 mm0.53 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1525405573
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: 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 6
Current: £380 GBP|Low: £262 GBP|High: £438 GBP|Avg: £343 GBP|-13.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3£287 GBP
Retailer 4£309 GBP
Retailer 2£353 GBP
Blue Nile£380 GBP

41 data points across 4 retailers

4 retailers£287 GBP to £380 GBP

A
Cheapest Retailer
-
£287 GBP
Final sale: no returns
A
Retailer 2
-
£309 GBP
View
A
Retailer 3
-
£353 GBP
View
Most Expensive
B+
Blue Nile
25300038 · Nov 5
£380 GBP
$509 USD
View
3 more retailers have this diamond
Prices start from £287 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
0.53ct Heart
£287 GBP