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Heart|Natural|GIA

0.51ct H SI1 Heart Natural Diamond

GD • H/SI1 • GIA 1539172035

Certificate GIA 1539172035

Diamond specifications and retailer prices

From £295 GBP
As of November 6, 2026
Save £84 GBP (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £379 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1539172035. Listed at 4 retailers as of November 6, 2026, with prices from £295 to £379, a £84 spread on the same certified stone. 77 Diamonds lists it at £379. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1539172035
Dimensions5.07 × 5.58 × 3.23 mm
L/W Ratio1.10
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
5.07 mm5.58 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1539172035
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 57.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £379 GBP|Low: £281 GBP|High: £437 GBP|Avg: £341 GBP|-11.2%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 2£295 GBP
Retailer 3£306 GBP
Retailer 4£331 GBP
77 Diamonds£379 GBP

41 data points across 4 retailers

4 retailers£295 GBP to £379 GBP

A
Cheapest Retailer
-
£295 GBP
A
Retailer 2
-
£306 GBP
View
Final sale: no returns
B+
Retailer 3
-
£331 GBP
View
Most Expensive
B+
77 Diamonds
HSCPANXBSTUF · Nov 6
£379 GBP
View
3 more retailers have this diamond
Prices start from £295 GBPSave up to £84 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
£295 GBP