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Heart|Natural|GIA

0.51ct F SI1 Heart Natural Diamond

GD • F/SI1 • GIA 2546919784

Certificate GIA 2546919784

Diamond specifications and retailer prices

From £344 GBP
As of November 6, 2026
Save £113 GBP (25%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £457 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 F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2546919784. Listed at 5 retailers as of November 5, 2026, with prices from £344 to £457, a £113 spread on the same certified stone. Blue Nile lists it at £457. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
F
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2546919784
Dimensions4.95 × 5.41 × 3.21 mm
L/W Ratio1.09
Top View
4.95 mm5.41 mm0.51 ctF / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 2546919784
Side View
Table 58.0%CrownGirdle: STK-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: £457 GBP|Low: £314 GBP|High: £503 GBP|Avg: £402 GBP|-9.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 3£344 GBP
Retailer 4£354 GBP
Retailer 5£386 GBP
Retailer 2£441 GBP
Blue Nile£457 GBP

40 data points across 5 retailers

5 retailers£344 GBP to £457 GBP

A
Cheapest Retailer
-
£344 GBP
A
Retailer 2
-
£354 GBP
View
Final sale: no returns
B+
Retailer 3
-
£386 GBP
View
B
Retailer 4
-
£441 GBP
View
Most Expensive
B
Blue Nile
28681148 · Nov 5
£457 GBP
$612 USD
View
4 more retailers have this diamond
Prices start from £344 GBPSave up to £113 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
£344 GBP