CaratHunter
Plans
Heart|Natural|GIA

0.64ct H SI2 Heart Natural Diamond

GD • H/SI2 • GIA 6555056145

Certificate GIA 6555056145

Diamond specifications and retailer prices

From £296 GBP
As of November 6, 2026
Save £79 GBP (21%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £375 GBP at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 0.64ct natural heart diamond

This 0.64ct natural heart sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6555056145. Listed at 4 retailers as of November 6, 2026, with prices from £296 to £375, a £79 spread on the same certified stone. 77 Diamonds lists it at £375. 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

0.64
Carat
H
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555056145
Dimensions5.45 × 6.01 × 3.42 mm
L/W Ratio1.10
Top View
5.45 mm6.01 mm0.64 ctH / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555056145
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 57.0%

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: £375 GBP|Low: £288 GBP|High: £433 GBP|Avg: £341 GBP|-11.7%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 7, 2026
Retailer 2£296 GBP
Retailer 4£305 GBP
Retailer 3£329 GBP
77 Diamonds£375 GBP

41 data points across 4 retailers

4 retailers£296 GBP to £375 GBP

A
Cheapest Retailer
-
£296 GBP
A
Retailer 2
-
£305 GBP
View
Final sale: no returns
B+
Retailer 3
-
£329 GBP
View
Most Expensive
B+
77 Diamonds
HSCPS7ECESWA · Nov 7
£375 GBP
View
3 more retailers have this diamond
Prices start from £296 GBPSave up to £79 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
0.64ct Heart
£296 GBP