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
|
isometric |
2.29 |
6.00 |
1.483-1.487 |
none |
Heliodor
|
hexagonal |
2.72 |
7.5-8.0 |
1.577-1.583 |
irradiation,heat |
Hematite
|
hexagonal |
5.20 |
5.5-6.5 |
2.940-3.220 |
none known |
Hemimorphite
|
orthorhombic |
3.45 |
4.5-5.0 |
1.614-1.636 |
none known |
Horn
|
organic |
1.70-1.85 |
2.5 |
1.56 |
none known |
Howlite
|
monocliinic
aggregate
|
2.58 |
3.5-4.0 |
1.586-1.605 |
dying |