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Heart|Natural|GIA

0.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 1537574585

Certificate GIA 1537574585

Diamond specifications and retailer prices

From £268 GBP
As of November 2, 2026
Save £98 GBP (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £366 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded I 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 1537574585. Listed at 4 retailers as of November 2, 2026, with prices from £268 to £366, a £98 spread on the same certified stone. Brilliant Earth lists it at £366. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1537574585
Dimensions5.69 × 5.15 × 3.13 mm
L/W Ratio1.10
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
5.69 mm5.15 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1537574585
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 55.0%

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 2
Current: £366 GBP|Low: £256 GBP|High: £418 GBP|Avg: £325 GBP|-12.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 2£268 GBP
Retailer 4£280 GBP
Retailer 5£300 GBP
Retailer 3£347 GBP
Brilliant Earth£366 GBP

35 data points across 5 retailers

4 retailers£268 GBP to £366 GBP

A
Cheapest Retailer
-
£268 GBP
A
Retailer 2
-
£300 GBP
View
B+
Retailer 3
-
£347 GBP
View
Most Expensive
B+
Brilliant Earth
15915585A · Nov 2
£366 GBP
$490 USD
View
3 more retailers have this diamond
Prices start from £268 GBPSave up to £98 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
£268 GBP