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Alphabetical Gemstone List
Click on a letter for a list of gems:

A| B| C| D| E| F| G| H| I| J| K| L| M| N| O| P| Q| R| S| T|U| V| W| X|Y |Z

Gemstones that begin with the letter "H"

Gemstone Crystal System Density Hardness Refractive index Treatments

hackmanite
Hackmanite

isometric 2.29 6.00 1.483-1.487 none

heliodor
Heliodor

hexagonal 2.72 7.5-8.0 1.577-1.583 irradiation,heat

hematite
Hematite

hexagonal 5.20 5.5-6.5 2.940-3.220 none known

hemimorphite
Hemimorphite

orthorhombic 3.45 4.5-5.0 1.614-1.636 none known

horn
Horn

organic 1.70-1.85 2.5 1.56 none known

howlite
Howlite

monocliinic
aggregate
2.58 3.5-4.0 1.586-1.605 dying